Create a New Global Shader as a Plugin | Unreal Engine 4.27 Documentation

The Unreal Engine 4 (UE4) Plugin system enables anyone to add a wide range of new functionality without the need to recompile and distribute the entire engine. In the following How - To we will recreate the Lens Distortion global shader plugin to demonstrate how you would go about implementing a global shader that is controllable via Blueprints.

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For this example, we will be re-creating the existing Lens Distortion plugin that can be found in Engine\Plugins\Compositing\LensDistortion to a new Plugin called Foo to demonstrate how you would implement this workflow.

The Shaders in Plugins Quick Start will walk you through creating and using global shader as a Plugin.

1 - Code Setup

Before you can start creating a new Plugin for Unreal Engine 4 (UE4) you will first need to make sure that you have Visual Studio installed. Visual Studio is required for this Quick Start as you will need to compile your Plugin's code so that it can run. If you are not sure how to go about doing this, check out the Setting Up Visual Studio for UE4 documents for more help.

First, create a new Games project and select a Blank template. Make sure that you have Maximum Quality and No Starter Content enabled.
Once the project has been created, Visual Studio will open up and after it has, right- click on the ShadersInPlugins project and select the Build option to compile the project.
When the project has finished compiling, press the F5 key inside Visual Studio to launch the ShadersInPlugins project in the UE4 Editor.
Once the UE4 Editor has finished loading, open up the Plugins manager by going to Edit > Plugins and then click on the New Plugin option that is on the lower right-hand side of the Plugin window to bring up the New Plugin creation window.

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From the New Plugin window, select the Blank plugin and then input the name Foo for the name and keeping all of the settings as default. When all of that is completed, press the Create Plugin button to create all of the initial required content for the plugin.

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When that is completed, shut down UE4 and Visual Studio and then go to the Plugins > Foo plugin folder that was created inside your project folder.
Inside the Foo plugins folder, add a new folder called Shaders and then inside of that folder, create a new folder called Private.

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Inside of the Private folder, create a new text file and call it MyShader.USF and then copy and paste the following HLSL code into this file, saving the file when completed.

Make sure that you change the file extension to .USF or UE4 will not understand that this is a shader file.

		// Copyright 1998-2018 Epic Games, Inc. All Rights Reserved.

		/*=============================================================================
			LensDistortionUVGeneration.usf: Generate lens distortion and undistortion
			UV displacement map into a render target.

			The pixel shader directly compute the distort viewport UV to undistort
			viewport UV displacement using Sv_Position and the reference equations and
			store them into the red and green channels.

			However to avoid resolving with a ferrari method, or doing a newton method
			on the GPU to compute the undistort viewport UV to distort viewport UV
			displacement, this couple of shaders works as follow: The vertex shader
			undistort the grid's vertices, and pass down to the pixel shader the viewport
			UV of where they should have been on screen without undistortion. The pixel
			shader can then generate the undistort viewport UV to distort viewport UV
			displacement by just subtracting the pixel's viewport UV.
		=============================================================================*/

		#include "/Engine/Public/Platform.ush"

		// Size of the pixels in the viewport UV coordinates.
		float2 PixelUVSize;

		// K1, K2, K3
		float3 RadialDistortionCoefs;

		// P1, P2
		float2 TangentialDistortionCoefs;

		// Camera matrix of the undistorted viewport.
		float4 UndistortedCameraMatrix;

		// Camera matrix of the distorted viewport.
		float4 DistortedCameraMatrix;

		// Output multiply and add to the render target.
		float2 OutputMultiplyAndAdd;

		// Undistort a view position at V.z=1.
		float2 UndistortNormalizedViewPosition(float2 V)
		{
			float2 V2 = V * V;
			float R2 = V2.x + V2.y;

			// Radial distortion (extra parenthesis to match MF_Undistortion.uasset).
			float2 UndistortedV = V * (1.0 + R2 * (RadialDistortionCoefs.x + R2 * (RadialDistortionCoefs.y + R2 * RadialDistortionCoefs.z)));

			// Tangential distortion.
			UndistortedV.x += TangentialDistortionCoefs.y * (R2 + 2 * V2.x) + 2 * TangentialDistortionCoefs.x * V.x * V.y;
			UndistortedV.y += TangentialDistortionCoefs.x * (R2 + 2 * V2.y) + 2 * TangentialDistortionCoefs.y * V.x * V.y;

			return UndistortedV;
		}

		// Returns the undistorted viewport UV of the distorted's viewport UV.
		//
		// Notes:
		// UVs are bottom left originated.
		float2 UndistortViewportUV(float2 ViewportUV)
		{
			// Distorted viewport UV -> Distorted view position (z=1)
			float2 DistortedViewPosition = (ViewportUV - DistortedCameraMatrix.zw) / DistortedCameraMatrix.xy;

			// Compute undistorted view position (z=1)
			float2 UndistortedViewPosition = UndistortNormalizedViewPosition(DistortedViewPosition);

			// Undistorted view position (z=1) -> Undistorted viewport UV.
			return UndistortedCameraMatrix.xy * UndistortedViewPosition + UndistortedCameraMatrix.zw;
		}

		// Flip UV's y component.
		float2 FlipUV(float2 UV)
		{
			return float2(UV.x, 1 - UV.y);
		}

		void MainVS(
			in uint GlobalVertexId : SV_VertexID,
			out float2 OutVertexDistortedViewportUV : TEXCOORD0,
			out float4 OutPosition : SV_POSITION
			)
		{
			// Compute the cell index.
			uint GridCellIndex = GlobalVertexId / 6;

			// Compute row and column id of the cell within the grid.
			uint GridColumnId = GridCellIndex / GRID_SUBDIVISION_Y;
			uint GridRowId = GridCellIndex - GridColumnId * GRID_SUBDIVISION_Y;

			// Compute the vertex id within a 2 triangles grid cell.
			uint VertexId = GlobalVertexId - GridCellIndex * 6;

			// Compute the bottom left originated UV coordinate of the triangle's vertex within the cell.
			float2 CellVertexUV = float2(0x1 & ((VertexId + 1) / 3), VertexId & 0x1);

			// Compute the top left originated UV of the vertex within the grid.
			float2 GridInvSize = 1.f / float2(GRID_SUBDIVISION_X, GRID_SUBDIVISION_Y);
			float2 GridVertexUV = FlipUV(
				GridInvSize * (CellVertexUV + float2(GridColumnId, GridRowId)));

			// The standard doesn't have half pixel shift.
			GridVertexUV -= PixelUVSize * 0.5;

			// Output vertex position.
			OutPosition = float4(FlipUV(
				UndistortViewportUV(GridVertexUV) + PixelUVSize * 0.5) * 2 - 1, 0, 1);

			// Output top left originated UV of the vertex.
			OutVertexDistortedViewportUV = GridVertexUV;
		}

		void MainPS(
			in noperspective float2 VertexDistortedViewportUV : TEXCOORD0,
			in float4 SvPosition : SV_POSITION,
			out float4 OutColor : SV_Target0
			)
		{
			// Compute the pixel's top left originated UV.
			float2 ViewportUV = SvPosition.xy * PixelUVSize;

			// The standard doesn't have half pixel shift.
			ViewportUV -= PixelUVSize * 0.5;

			float2 DistortUVtoUndistortUV = (UndistortViewportUV((ViewportUV))) - ViewportUV;
			float2 UndistortUVtoDistortUV = VertexDistortedViewportUV - ViewportUV;

			// Output displacement channels.
			OutColor = OutputMultiplyAndAdd.y + OutputMultiplyAndAdd.x * float4(
				DistortUVtoUndistortUV, UndistortUVtoDistortUV);
		}

/*=============================================================================
			LensDistortionUVGeneration.usf: Generate lens distortion and undistortion
			UV displacement map into a render target.

The pixel shader directly compute the distort viewport UV to undistort
			viewport UV displacement using Sv_Position and the reference equations and
			store them into the red and green channels.

However to avoid resolving with a ferrari method, or doing a newton method
			on the GPU to compute the undistort viewport UV to distort viewport UV
			displacement, this couple of shaders works as follow: The vertex shader
			undistort the grid's vertices, and pass down to the pixel shader the viewport
			UV of where they should have been on screen without undistortion. The pixel
			shader can then generate the undistort viewport UV to distort viewport UV
			displacement by just subtracting the pixel's viewport UV.
		=============================================================================*/

#include "/Engine/Public/Platform.ush"

// Size of the pixels in the viewport UV coordinates.
		float2 PixelUVSize;

// K1, K2, K3
		float3 RadialDistortionCoefs;

// P1, P2
		float2 TangentialDistortionCoefs;

// Camera matrix of the undistorted viewport.
		float4 UndistortedCameraMatrix;

// Camera matrix of the distorted viewport.
		float4 DistortedCameraMatrix;

// Output multiply and add to the render target.
		float2 OutputMultiplyAndAdd;

// Undistort a view position at V.z=1.
		float2 UndistortNormalizedViewPosition(float2 V)
		{
			float2 V2 = V * V;
			float R2 = V2.x + V2.y;

// Radial distortion (extra parenthesis to match MF_Undistortion.uasset).
			float2 UndistortedV = V * (1.0 + R2 * (RadialDistortionCoefs.x + R2 * (RadialDistortionCoefs.y + R2 * RadialDistortionCoefs.z)));

// Tangential distortion.
			UndistortedV.x += TangentialDistortionCoefs.y * (R2 + 2 * V2.x) + 2 * TangentialDistortionCoefs.x * V.x * V.y;
			UndistortedV.y += TangentialDistortionCoefs.x * (R2 + 2 * V2.y) + 2 * TangentialDistortionCoefs.y * V.x * V.y;

return UndistortedV;
		}

// Returns the undistorted viewport UV of the distorted's viewport UV.
		//
		// Notes:
		// UVs are bottom left originated.
		float2 UndistortViewportUV(float2 ViewportUV)
		{
			// Distorted viewport UV -> Distorted view position (z=1)
			float2 DistortedViewPosition = (ViewportUV - DistortedCameraMatrix.zw) / DistortedCameraMatrix.xy;

// Compute undistorted view position (z=1)
			float2 UndistortedViewPosition = UndistortNormalizedViewPosition(DistortedViewPosition);

// Undistorted view position (z=1) -> Undistorted viewport UV.
			return UndistortedCameraMatrix.xy * UndistortedViewPosition + UndistortedCameraMatrix.zw;
		}

// Flip UV's y component.
		float2 FlipUV(float2 UV)
		{
			return float2(UV.x, 1 - UV.y);
		}

void MainVS(
			in uint GlobalVertexId : SV_VertexID,
			out float2 OutVertexDistortedViewportUV : TEXCOORD0,
			out float4 OutPosition : SV_POSITION
			)
		{
			// Compute the cell index.
			uint GridCellIndex = GlobalVertexId / 6;

// Compute row and column id of the cell within the grid.
			uint GridColumnId = GridCellIndex / GRID_SUBDIVISION_Y;
			uint GridRowId = GridCellIndex - GridColumnId * GRID_SUBDIVISION_Y;

// Compute the vertex id within a 2 triangles grid cell.
			uint VertexId = GlobalVertexId - GridCellIndex * 6;

// Compute the bottom left originated UV coordinate of the triangle's vertex within the cell.
			float2 CellVertexUV = float2(0x1 & ((VertexId + 1) / 3), VertexId & 0x1);

// Compute the top left originated UV of the vertex within the grid.
			float2 GridInvSize = 1.f / float2(GRID_SUBDIVISION_X, GRID_SUBDIVISION_Y);
			float2 GridVertexUV = FlipUV(
				GridInvSize * (CellVertexUV + float2(GridColumnId, GridRowId)));

// The standard doesn't have half pixel shift.
			GridVertexUV -= PixelUVSize * 0.5;

// Output vertex position.
			OutPosition = float4(FlipUV(
				UndistortViewportUV(GridVertexUV) + PixelUVSize * 0.5) * 2 - 1, 0, 1);

// Output top left originated UV of the vertex.
			OutVertexDistortedViewportUV = GridVertexUV;
		}

void MainPS(
			in noperspective float2 VertexDistortedViewportUV : TEXCOORD0,
			in float4 SvPosition : SV_POSITION,
			out float4 OutColor : SV_Target0
			)
		{
			// Compute the pixel's top left originated UV.
			float2 ViewportUV = SvPosition.xy * PixelUVSize;

// The standard doesn't have half pixel shift.
			ViewportUV -= PixelUVSize * 0.5;

float2 DistortUVtoUndistortUV = (UndistortViewportUV((ViewportUV))) - ViewportUV;
			float2 UndistortUVtoDistortUV = VertexDistortedViewportUV - ViewportUV;

// Output displacement channels.
			OutColor = OutputMultiplyAndAdd.y + OutputMultiplyAndAdd.x * float4(
				DistortUVtoUndistortUV, UndistortUVtoDistortUV);
		}

Now, locate the Foo.uplugin file and open it up inside of a text editor and replace the information in that file with the following text, saving the file when done.

		{
			"FileVersion" : 3,
			"Version" : 1,
			"VersionName" : "1.0",
			"FriendlyName" : "Foo",
			"Description" : "Plugin to play around with shaders.",
			"Category" : "Sandbox",
			"CreatedBy" : "Epic Games, Inc.",
			"CreatedByURL" : "http://epicgames.com",
			"DocsURL" : "",
			"MarketplaceURL" : "",
			"SupportURL" : "",
			"EnabledByDefault" : false,
			"CanContainContent" : true,
			"IsBetaVersion" : false,
			"Installed" : false,
			"Modules" :
			[
				{
					"Name" : "Foo",
					"Type" : "Developer",
					"LoadingPhase" : "PostConfigInit"
				}
			]
		}

Next, go to Plugins\Foo\Source\Foo and create a new folder called, Classes and then copy both the LensDistortionAPI.h and LensDistortionBlueprintLibrary.h files from Engine\Plugins\Compositing\LensDistortion to this newly created folder.

The files that we will be copying can be found in Engine\Plugins\Compositing\LensDistortion.

* Classes - Create New Folder

Copy - LensDistortionAPI.h Copy - LensDistortionBlueprintLibrary.h

Then, go to the Private folder and copy both the LensDistortionBlueprintLibrary.cpp and the LensDistortionRendering.cpp files to this Private folder.
- Private - Existing Folder
  - Copy - LensDistortionBlueprintLibrary.cpp
  - Copy - LensDistortionRendering.cpp
Now close both the UE4 Editor and Visual Studio and then locate your projects .U project file. When located, right-click on it and select the Generate Visual Studio project files option.
Reopen your Visual Studio solution and then go to Foo > Classes and open up the LensDistortionAPI.h file. Inside this file replace FLensDistortionCameraModel with FFooCameraModel.

You should replace FLensDistortionCameraModel with FFooCameraModel four times in this file.

			// Copyright 1998-2018 Epic Games, Inc. All Rights Reserved.

			#pragma once

			#include "CoreMinimal.h"
			#include "LensDistortionAPI.generated.h"

			/** Mathematic camera model for lens distortion/undistortion.
			*
			* Camera matrix =
			* | F.X 0 C.x |
			* | 0 F.Y C.Y |
			* | 0 0 1 |
			*/
			USTRUCT(BlueprintType)
			struct FFooCameraModel
			{
				GENERATED_USTRUCT_BODY()
				FFooCameraModel()
				{
					K1 = K2 = K3 = P1 = P2 = 0.f;
					F = FVector2D(1.f, 1.f);
					C = FVector2D(0.5f, 0.5f);
				}

				/** Radial parameter #1. */
				UPROPERTY(Interp, EditAnywhere, BlueprintReadWrite, Category = "Lens Distortion|Camera Model")
				float K1;

				/** Radial parameter #2. */
				UPROPERTY(Interp, EditAnywhere, BlueprintReadWrite, Category = "Lens Distortion|Camera Model")
				float K2;

				/** Radial parameter #3. */
				UPROPERTY(Interp, EditAnywhere, BlueprintReadWrite, Category = "Lens Distortion|Camera Model")
				float K3;

				/** Tangential parameter #1. */
				UPROPERTY(Interp, EditAnywhere, BlueprintReadWrite, Category = "Lens Distortion|Camera Model")
				float P1;

				/** Tangential parameter #2. */
				UPROPERTY(Interp, EditAnywhere, BlueprintReadWrite, Category = "Lens Distortion|Camera Model")
				float P2;

				/** Camera matrix's Fx and Fy. */
				UPROPERTY(Interp, EditAnywhere, BlueprintReadWrite, Category = "Lens Distortion|Camera Model")
				FVector2D F;

				/** Camera matrix's Cx and Cy. */
				UPROPERTY(Interp, EditAnywhere, BlueprintReadWrite, Category = "Lens Distortion|Camera Model")
				FVector2D C;

				/** Undistorts 3d vector (x, y, z=1.f) in the view space and returns (x', y', z'=1.f). */
				FVector2D UndistortNormalizedViewPosition(FVector2D V) const;

				/** Returns the overscan factor required for the undistort rendering to avoid unrendered distorted pixels. */
				float GetUndistortOverscanFactor(
					float DistortedHorizontalFOV,
					float DistortedAspectRatio) const;

				/** Draws UV displacement map within the output render target.
				* - Red & green channels hold the distortion displacement;
				* - Blue & alpha channels hold the undistortion displacement.
				* @param World Current world to get the rendering settings from (such as feature level).
				* @param DistortedHorizontalFOV The desired horizontal FOV in the distorted render.
				* @param DistortedAspectRatio The desired aspect ratio of the distorted render.
				* @param UndistortOverscanFactor The factor of the overscan for the undistorted render.
				* @param OutputRenderTarget The render target to draw to. Don't necessarily need to have same resolution or aspect ratio as distorted render.
				* @param OutputMultiply The multiplication factor applied on the displacement.
				* @param OutputAdd Value added to the multiplied displacement before storing the output render target.
				*/
				void DrawUVDisplacementToRenderTarget(
					class UWorld* World,
					float DistortedHorizontalFOV,
					float DistortedAspectRatio,
					float UndistortOverscanFactor,
					class UTextureRenderTarget2D* OutputRenderTarget,
					float OutputMultiply,
					float OutputAdd) const;

				/** Compare two lens distortion models and return whether they are equal. */
				bool operator == (const FFooCameraModel& Other) const
				{
					return (
						K1 == Other.K1 &&
						K2 == Other.K2 &&
						K3 == Other.K3 &&
						P1 == Other.P1 &&
						P2 == Other.P2 &&
						F == Other.F &&
						C == Other.C);
				}

				/** Compare two lens distortion models and return whether they are different. */
				bool operator != (const FFooCameraModel& Other) const
				{
					return !(*this == Other);
				}
			};

#pragma once

#include "CoreMinimal.h"
			#include "LensDistortionAPI.generated.h"

/** Mathematic camera model for lens distortion/undistortion.
			*
			* Camera matrix =
			* | F.X 0 C.x |
			* | 0 F.Y C.Y |
			* | 0 0 1 |
			*/
			USTRUCT(BlueprintType)
			struct FFooCameraModel
			{
				GENERATED_USTRUCT_BODY()
				FFooCameraModel()
				{
					K1 = K2 = K3 = P1 = P2 = 0.f;
					F = FVector2D(1.f, 1.f);
					C = FVector2D(0.5f, 0.5f);
				}

/** Radial parameter #1. */
				UPROPERTY(Interp, EditAnywhere, BlueprintReadWrite, Category = "Lens Distortion|Camera Model")
				float K1;

/** Radial parameter #2. */
				UPROPERTY(Interp, EditAnywhere, BlueprintReadWrite, Category = "Lens Distortion|Camera Model")
				float K2;

/** Radial parameter #3. */
				UPROPERTY(Interp, EditAnywhere, BlueprintReadWrite, Category = "Lens Distortion|Camera Model")
				float K3;

/** Tangential parameter #1. */
				UPROPERTY(Interp, EditAnywhere, BlueprintReadWrite, Category = "Lens Distortion|Camera Model")
				float P1;

/** Tangential parameter #2. */
				UPROPERTY(Interp, EditAnywhere, BlueprintReadWrite, Category = "Lens Distortion|Camera Model")
				float P2;

/** Camera matrix's Fx and Fy. */
				UPROPERTY(Interp, EditAnywhere, BlueprintReadWrite, Category = "Lens Distortion|Camera Model")
				FVector2D F;

/** Camera matrix's Cx and Cy. */
				UPROPERTY(Interp, EditAnywhere, BlueprintReadWrite, Category = "Lens Distortion|Camera Model")
				FVector2D C;

/** Undistorts 3d vector (x, y, z=1.f) in the view space and returns (x', y', z'=1.f). */
				FVector2D UndistortNormalizedViewPosition(FVector2D V) const;

/** Returns the overscan factor required for the undistort rendering to avoid unrendered distorted pixels. */
				float GetUndistortOverscanFactor(
					float DistortedHorizontalFOV,
					float DistortedAspectRatio) const;

/** Draws UV displacement map within the output render target.
				* - Red & green channels hold the distortion displacement;
				* - Blue & alpha channels hold the undistortion displacement.
				* @param World Current world to get the rendering settings from (such as feature level).
				* @param DistortedHorizontalFOV The desired horizontal FOV in the distorted render.
				* @param DistortedAspectRatio The desired aspect ratio of the distorted render.
				* @param UndistortOverscanFactor The factor of the overscan for the undistorted render.
				* @param OutputRenderTarget The render target to draw to. Don't necessarily need to have same resolution or aspect ratio as distorted render.
				* @param OutputMultiply The multiplication factor applied on the displacement.
				* @param OutputAdd Value added to the multiplied displacement before storing the output render target.
				*/
				void DrawUVDisplacementToRenderTarget(
					class UWorld* World,
					float DistortedHorizontalFOV,
					float DistortedAspectRatio,
					float UndistortOverscanFactor,
					class UTextureRenderTarget2D* OutputRenderTarget,
					float OutputMultiply,
					float OutputAdd) const;

/** Compare two lens distortion models and return whether they are equal. */
				bool operator == (const FFooCameraModel& Other) const
				{
					return (
						K1 == Other.K1 &&
						K2 == Other.K2 &&
						K3 == Other.K3 &&
						P1 == Other.P1 &&
						P2 == Other.P2 &&
						F == Other.F &&
						C == Other.C);
				}

/** Compare two lens distortion models and return whether they are different. */
				bool operator != (const FFooCameraModel& Other) const
				{
					return !(*this == Other);
				}
			};

Next, open up the LensDistortionBlueprintLibrary.h file. This file controls how this node will show up in Blueprints so not only do we need to replace FLensDistortionCameraModel with FFooCameraModel, we also need to change the Category = "Lens Distortion" to Category = "Foo | Lens Distortion".

You should replace FLensDistortionCameraModel with FFooCameraModel six times in this file.

		// Copyright 1998-2018 Epic Games, Inc. All Rights Reserved.

		#pragma once

		#include "CoreMinimal.h"
		#include "UObject/ObjectMacros.h"
		#include "Classes/Kismet/BlueprintFunctionLibrary.h"
		#include "LensDistortionAPI.h"
		#include "LensDistortionBlueprintLibrary.generated.h"

		UCLASS(MinimalAPI)
		class ULensDistortionBlueprintLibrary : public UBlueprintFunctionLibrary
		{
			GENERATED_UCLASS_BODY()

			/** Returns the overscan factor required for the undistort rendering to avoid unrendered distorted pixels. */
			UFUNCTION(BlueprintPure, Category = "Foo | Lens Distortion")
			static void GetUndistortOverscanFactor(
				const FFooCameraModel& CameraModel,
				float DistortedHorizontalFOV,
				float DistortedAspectRatio,
				float& UndistortOverscanFactor);

			/** Draws UV displacement map within the output render target.
			* - Red & green channels hold the distortion displacement;
			* - Blue & alpha channels hold the undistortion displacement.
			* @param DistortedHorizontalFOV The desired horizontal FOV in the distorted render.
			* @param DistortedAspectRatio The desired aspect ratio of the distorted render.
			* @param UndistortOverscanFactor The factor of the overscan for the undistorted render.
			* @param OutputRenderTarget The render target to draw to. Don't necessarily need to have same resolution or aspect ratio as distorted render.
			* @param OutputMultiply The multiplication factor applied on the displacement.
			* @param OutputAdd Value added to the multiplied displacement before storing into the output render target.
			*/
			UFUNCTION(BlueprintCallable, Category = "Foo | Lens Distortion", meta = (WorldContext = "WorldContextObject"))
			static void DrawUVDisplacementToRenderTarget(
				const UObject* WorldContextObject,
				const FFooCameraModel& CameraModel,
				float DistortedHorizontalFOV,
				float DistortedAspectRatio,
				float UndistortOverscanFactor,
				class UTextureRenderTarget2D* OutputRenderTarget,
				float OutputMultiply = 0.5,
				float OutputAdd = 0.5
				);

			/* Returns true if A is equal to B (A == B) */
			UFUNCTION(BlueprintPure, meta=(DisplayName = "Equal (LensDistortionCameraModel)", CompactNodeTitle = "==", Keywords = "== equal"), Category = "Foo | Lens Distortion")
			static bool EqualEqual_CompareLensDistortionModels(
				const FFooCameraModel& A,
				const FFooCameraModel& B)
			{
				return A == B;
			}

			/* Returns true if A is not equal to B (A != B) */
			UFUNCTION(BlueprintPure, meta = (DisplayName = "NotEqual (LensDistortionCameraModel)", CompactNodeTitle = "!=", Keywords = "!= not equal"), Category = "Foo | Lens Distortion")
			static bool NotEqual_CompareLensDistortionModels(
				const FFooCameraModel& A,
				const FFooCameraModel& B)
			{
				return A != B;
			}
		};

#pragma once

#include "CoreMinimal.h"
		#include "UObject/ObjectMacros.h"
		#include "Classes/Kismet/BlueprintFunctionLibrary.h"
		#include "LensDistortionAPI.h"
		#include "LensDistortionBlueprintLibrary.generated.h"

UCLASS(MinimalAPI)
		class ULensDistortionBlueprintLibrary : public UBlueprintFunctionLibrary
		{
			GENERATED_UCLASS_BODY()

/** Returns the overscan factor required for the undistort rendering to avoid unrendered distorted pixels. */
			UFUNCTION(BlueprintPure, Category = "Foo | Lens Distortion")
			static void GetUndistortOverscanFactor(
				const FFooCameraModel& CameraModel,
				float DistortedHorizontalFOV,
				float DistortedAspectRatio,
				float& UndistortOverscanFactor);

/** Draws UV displacement map within the output render target.
			* - Red & green channels hold the distortion displacement;
			* - Blue & alpha channels hold the undistortion displacement.
			* @param DistortedHorizontalFOV The desired horizontal FOV in the distorted render.
			* @param DistortedAspectRatio The desired aspect ratio of the distorted render.
			* @param UndistortOverscanFactor The factor of the overscan for the undistorted render.
			* @param OutputRenderTarget The render target to draw to. Don't necessarily need to have same resolution or aspect ratio as distorted render.
			* @param OutputMultiply The multiplication factor applied on the displacement.
			* @param OutputAdd Value added to the multiplied displacement before storing into the output render target.
			*/
			UFUNCTION(BlueprintCallable, Category = "Foo | Lens Distortion", meta = (WorldContext = "WorldContextObject"))
			static void DrawUVDisplacementToRenderTarget(
				const UObject* WorldContextObject,
				const FFooCameraModel& CameraModel,
				float DistortedHorizontalFOV,
				float DistortedAspectRatio,
				float UndistortOverscanFactor,
				class UTextureRenderTarget2D* OutputRenderTarget,
				float OutputMultiply = 0.5,
				float OutputAdd = 0.5
				);

/* Returns true if A is equal to B (A == B) */
			UFUNCTION(BlueprintPure, meta=(DisplayName = "Equal (LensDistortionCameraModel)", CompactNodeTitle = "==", Keywords = "== equal"), Category = "Foo | Lens Distortion")
			static bool EqualEqual_CompareLensDistortionModels(
				const FFooCameraModel& A,
				const FFooCameraModel& B)
			{
				return A == B;
			}

/* Returns true if A is not equal to B (A != B) */
			UFUNCTION(BlueprintPure, meta = (DisplayName = "NotEqual (LensDistortionCameraModel)", CompactNodeTitle = "!=", Keywords = "!= not equal"), Category = "Foo | Lens Distortion")
			static bool NotEqual_CompareLensDistortionModels(
				const FFooCameraModel& A,
				const FFooCameraModel& B)
			{
				return A != B;
			}
		};

Now go to the Private folder and open up the LensDistortionBlueprintLibrary.cpp file and replace the following:
- FLensDistortionCameraModel with FFooCameraModel
- ULensDistortionBlueprintLibrary with UFooBlueprintLibrary

You should replace FLensDistortionCameraModel with FFooCameraModel two times and ULensDistortionBlueprintLibrary with UFooBlueprintLibrary four times.

			// Copyright 1998-2018 Epic Games, Inc. All Rights Reserved.

			#include "LensDistortionBlueprintLibrary.h"

			ULensDistortionBlueprintLibrary::ULensDistortionBlueprintLibrary(const FObjectInitializer& ObjectInitializer)
				: Super(ObjectInitializer)
			{ }

			// static
			void ULensDistortionBlueprintLibrary::GetUndistortOverscanFactor(
				const FFooCameraModel& CameraModel,
				float DistortedHorizontalFOV,
				float DistortedAspectRatio,
				float& UndistortOverscanFactor)
			{
				UndistortOverscanFactor = CameraModel.GetUndistortOverscanFactor(DistortedHorizontalFOV, DistortedAspectRatio);
			}

			// static
			void ULensDistortionBlueprintLibrary::DrawUVDisplacementToRenderTarget(
				const UObject* WorldContextObject,
				const FFooCameraModel& CameraModel,
				float DistortedHorizontalFOV,
				float DistortedAspectRatio,
				float UndistortOverscanFactor,
				class UTextureRenderTarget2D* OutputRenderTarget,
				float OutputMultiply,
				float OutputAdd)
			{
				CameraModel.DrawUVDisplacementToRenderTarget(
					WorldContextObject->GetWorld(),
					DistortedHorizontalFOV, DistortedAspectRatio,
					UndistortOverscanFactor, OutputRenderTarget,
					OutputMultiply, OutputAdd);
			}

#include "LensDistortionBlueprintLibrary.h"

ULensDistortionBlueprintLibrary::ULensDistortionBlueprintLibrary(const FObjectInitializer& ObjectInitializer)
				: Super(ObjectInitializer)
			{ }

// static
			void ULensDistortionBlueprintLibrary::GetUndistortOverscanFactor(
				const FFooCameraModel& CameraModel,
				float DistortedHorizontalFOV,
				float DistortedAspectRatio,
				float& UndistortOverscanFactor)
			{
				UndistortOverscanFactor = CameraModel.GetUndistortOverscanFactor(DistortedHorizontalFOV, DistortedAspectRatio);
			}

// static
			void ULensDistortionBlueprintLibrary::DrawUVDisplacementToRenderTarget(
				const UObject* WorldContextObject,
				const FFooCameraModel& CameraModel,
				float DistortedHorizontalFOV,
				float DistortedAspectRatio,
				float UndistortOverscanFactor,
				class UTextureRenderTarget2D* OutputRenderTarget,
				float OutputMultiply,
				float OutputAdd)
			{
				CameraModel.DrawUVDisplacementToRenderTarget(
					WorldContextObject->GetWorld(),
					DistortedHorizontalFOV, DistortedAspectRatio,
					UndistortOverscanFactor, OutputRenderTarget,
					OutputMultiply, OutputAdd);
			}

Next, in the Private folder open up the LensDistortionRendering.cpp file and replace FLensDistortionCameraModel with FFooCameraModel

You should replace FLensDistortionCameraModel with FFooCameraModel six times in this file.

			// Copyright 1998-2018 Epic Games, Inc. All Rights Reserved.

			#include "LensDistortionAPI.h"
			#include "Classes/Engine/TextureRenderTarget2D.h"
			#include "Classes/Engine/World.h"
			#include "Public/GlobalShader.h"
			#include "Public/PipelineStateCache.h"
			#include "Public/RHIStaticStates.h"
			#include "Public/SceneUtils.h"
			#include "Public/SceneInterface.h"
			#include "Public/ShaderParameterUtils.h"

			static const uint32 kGridSubdivisionX = 32;
			static const uint32 kGridSubdivisionY = 16;

			/**
			* Internal intermediary structure derived from FFooCameraModel by the game thread
			* to hand to the render thread.
			*/
			struct FCompiledCameraModel
			{
				/** Orignal camera model that has generated this compiled model. */
				FFooCameraModel OriginalCameraModel;

				/** Camera matrices of the lens distortion for the undistorted and distorted render.
				* XY holds the scales factors, ZW holds the translates.
				*/
				FVector4 DistortedCameraMatrix;
				FVector4 UndistortedCameraMatrix;

				/** Output multiply and add of the channel to the render target. */
				FVector2D OutputMultiplyAndAdd;
			};

			/** Undistorts top left originated viewport UV into the view space (x', y', z'=1.f) */
			static FVector2D LensUndistortViewportUVIntoViewSpace(
				const FFooCameraModel& CameraModel,
				float TanHalfDistortedHorizontalFOV, float DistortedAspectRatio,
				FVector2D DistortedViewportUV)
			{
				FVector2D AspectRatioAwareF = CameraModel.F * FVector2D(1, -DistortedAspectRatio);
				return CameraModel.UndistortNormalizedViewPosition((DistortedViewportUV - CameraModel.C) / AspectRatioAwareF);
			}

			class FLensDistortionUVGenerationShader : public FGlobalShader
			{
			public:
				static bool ShouldCache(EShaderPlatform Platform)
				{
					return IsFeatureLevelSupported(Platform, ERHIFeatureLevel::SM4);
				}

				static void ModifyCompilationEnvironment(EShaderPlatform Platform, FShaderCompilerEnvironment& OutEnvironment)
				{
					FGlobalShader::ModifyCompilationEnvironment(Platform, OutEnvironment);
					OutEnvironment.SetDefine(TEXT("GRID_SUBDIVISION_X"), kGridSubdivisionX);
					OutEnvironment.SetDefine(TEXT("GRID_SUBDIVISION_Y"), kGridSubdivisionY);
				}

				FLensDistortionUVGenerationShader() {}

				FLensDistortionUVGenerationShader(const ShaderMetaType::CompiledShaderInitializerType& Initializer)
					: FGlobalShader(Initializer)
				{
					PixelUVSize.Bind(Initializer.ParameterMap, TEXT("PixelUVSize"));
					RadialDistortionCoefs.Bind(Initializer.ParameterMap, TEXT("RadialDistortionCoefs"));
					TangentialDistortionCoefs.Bind(Initializer.ParameterMap, TEXT("TangentialDistortionCoefs"));
					DistortedCameraMatrix.Bind(Initializer.ParameterMap, TEXT("DistortedCameraMatrix"));
					UndistortedCameraMatrix.Bind(Initializer.ParameterMap, TEXT("UndistortedCameraMatrix"));
					OutputMultiplyAndAdd.Bind(Initializer.ParameterMap, TEXT("OutputMultiplyAndAdd"));
				}

				template<typename TShaderRHIParamRef>
				void SetParameters(
					FRHICommandListImmediate& RHICmdList,
					const TShaderRHIParamRef ShaderRHI,
					const FCompiledCameraModel& CompiledCameraModel,
					const FIntPoint& DisplacementMapResolution)
				{
					FVector2D PixelUVSizeValue(
						1.f / float(DisplacementMapResolution.X), 1.f / float(DisplacementMapResolution.Y));
					FVector RadialDistortionCoefsValue(
						CompiledCameraModel.OriginalCameraModel.K1,
						CompiledCameraModel.OriginalCameraModel.K2,
						CompiledCameraModel.OriginalCameraModel.K3);
					FVector2D TangentialDistortionCoefsValue(
						CompiledCameraModel.OriginalCameraModel.P1,
						CompiledCameraModel.OriginalCameraModel.P2);

					SetShaderValue(RHICmdList, ShaderRHI, PixelUVSize, PixelUVSizeValue);
					SetShaderValue(RHICmdList, ShaderRHI, DistortedCameraMatrix, CompiledCameraModel.DistortedCameraMatrix);
					SetShaderValue(RHICmdList, ShaderRHI, UndistortedCameraMatrix, CompiledCameraModel.UndistortedCameraMatrix);
					SetShaderValue(RHICmdList, ShaderRHI, RadialDistortionCoefs, RadialDistortionCoefsValue);
					SetShaderValue(RHICmdList, ShaderRHI, TangentialDistortionCoefs, TangentialDistortionCoefsValue);
					SetShaderValue(RHICmdList, ShaderRHI, OutputMultiplyAndAdd, CompiledCameraModel.OutputMultiplyAndAdd);
				}

				virtual bool Serialize(FArchive& Ar) override
				{
					bool bShaderHasOutdatedParameters = FGlobalShader::Serialize(Ar);
					Ar << PixelUVSize << RadialDistortionCoefs << TangentialDistortionCoefs << DistortedCameraMatrix << UndistortedCameraMatrix << OutputMultiplyAndAdd;
					return bShaderHasOutdatedParameters;
				}

			private:
				FShaderParameter PixelUVSize;
				FShaderParameter RadialDistortionCoefs;
				FShaderParameter TangentialDistortionCoefs;
				FShaderParameter DistortedCameraMatrix;
				FShaderParameter UndistortedCameraMatrix;
				FShaderParameter OutputMultiplyAndAdd;

			};

			class FLensDistortionUVGenerationVS : public FLensDistortionUVGenerationShader
			{
				DECLARE_SHADER_TYPE(FLensDistortionUVGenerationVS, Global);

			public:

				/** Default constructor. */
				FLensDistortionUVGenerationVS() {}

				/** Initialization constructor. */
				FLensDistortionUVGenerationVS(const ShaderMetaType::CompiledShaderInitializerType& Initializer)
					: FLensDistortionUVGenerationShader(Initializer)
				{
				}
			};

			class FLensDistortionUVGenerationPS : public FLensDistortionUVGenerationShader
			{
				DECLARE_SHADER_TYPE(FLensDistortionUVGenerationPS, Global);

			public:

				/** Default constructor. */
				FLensDistortionUVGenerationPS() {}

				/** Initialization constructor. */
				FLensDistortionUVGenerationPS(const ShaderMetaType::CompiledShaderInitializerType& Initializer)
					: FLensDistortionUVGenerationShader(Initializer)
				{ }
			};

			IMPLEMENT_SHADER_TYPE(, FLensDistortionUVGenerationVS, TEXT("/Plugin/Foo/Private/MyShader.usf"), TEXT("MainVS"), SF_Vertex)
			IMPLEMENT_SHADER_TYPE(, FLensDistortionUVGenerationPS, TEXT("/Plugin/Foo/Private/MyShader.usf"), TEXT("MainPS"), SF_Pixel)

			static void DrawUVDisplacementToRenderTarget_RenderThread(
				FRHICommandListImmediate& RHICmdList,
				const FCompiledCameraModel& CompiledCameraModel,
				const FName& TextureRenderTargetName,
				FTextureRenderTargetResource* OutTextureRenderTargetResource,
				ERHIFeatureLevel::Type FeatureLevel)
			{
				check(IsInRenderingThread());

			#if WANTS_DRAW_MESH_EVENTS
				FString EventName;
				TextureRenderTargetName.ToString(EventName);
				SCOPED_DRAW_EVENTF(RHICmdList, SceneCapture, TEXT("LensDistortionDisplacementGeneration %s"), *EventName);
			#else
				SCOPED_DRAW_EVENT(RHICmdList, DrawUVDisplacementToRenderTarget_RenderThread);
			#endif

				// Set render target.
				SetRenderTarget(
					RHICmdList,
					OutTextureRenderTargetResource->GetRenderTargetTexture(),
					FTextureRHIRef(),
					ESimpleRenderTargetMode::EUninitializedColorAndDepth,
					FExclusiveDepthStencil::DepthNop_StencilNop);

				FIntPoint DisplacementMapResolution(OutTextureRenderTargetResource->GetSizeX(), OutTextureRenderTargetResource->GetSizeY());

				// Update viewport.
				RHICmdList.SetViewport(
					0, 0, 0.f,
					DisplacementMapResolution.X, DisplacementMapResolution.Y, 1.f);

				// Get shaders.
				TShaderMap<FGlobalShaderType>* GlobalShaderMap = GetGlobalShaderMap(FeatureLevel);
				TShaderMapRef< FLensDistortionUVGenerationVS > VertexShader(GlobalShaderMap);
				TShaderMapRef< FLensDistortionUVGenerationPS > PixelShader(GlobalShaderMap);

				// Set the graphic pipeline state.
				FGraphicsPipelineStateInitializer GraphicsPSOInit;
				RHICmdList.ApplyCachedRenderTargets(GraphicsPSOInit);
				GraphicsPSOInit.DepthStencilState = TStaticDepthStencilState<false, CF_Always>::GetRHI();
				GraphicsPSOInit.BlendState = TStaticBlendState<>::GetRHI();
				GraphicsPSOInit.RasterizerState = TStaticRasterizerState<>::GetRHI();
				GraphicsPSOInit.PrimitiveType = PT_TriangleList;
				GraphicsPSOInit.BoundShaderState.VertexDeclarationRHI = GetVertexDeclarationFVector4();
				GraphicsPSOInit.BoundShaderState.VertexShaderRHI = GETSAFERHISHADER_VERTEX(*VertexShader);
				GraphicsPSOInit.BoundShaderState.PixelShaderRHI = GETSAFERHISHADER_PIXEL(*PixelShader);
				SetGraphicsPipelineState(RHICmdList, GraphicsPSOInit);

				// Update viewport.
				RHICmdList.SetViewport(
					0, 0, 0.f,
					OutTextureRenderTargetResource->GetSizeX(), OutTextureRenderTargetResource->GetSizeY(), 1.f);

				// Update shader uniform parameters.
				VertexShader->SetParameters(RHICmdList, VertexShader->GetVertexShader(), CompiledCameraModel, DisplacementMapResolution);
				PixelShader->SetParameters(RHICmdList, PixelShader->GetPixelShader(), CompiledCameraModel, DisplacementMapResolution);

				// Draw grid.
				uint32 PrimitiveCount = kGridSubdivisionX * kGridSubdivisionY * 2;
				RHICmdList.DrawPrimitive(PT_TriangleList, 0, PrimitiveCount, 1);

				// Resolve render target.
				RHICmdList.CopyToResolveTarget(
					OutTextureRenderTargetResource->GetRenderTargetTexture(),
					OutTextureRenderTargetResource->TextureRHI,
					false, FResolveParams());
			}

			FVector2D FFooCameraModel::UndistortNormalizedViewPosition(FVector2D EngineV) const
			{
				// Engine view space -> standard view space.
				FVector2D V = FVector2D(1, -1) * EngineV;

				FVector2D V2 = V * V;
				float R2 = V2.X + V2.Y;

				// Radial distortion (extra parenthesis to match MF_Undistortion.uasset).
				FVector2D UndistortedV = V * (1.0 + (R2 * K1 + (R2 * R2) * K2 + (R2 * R2 * R2) * K3));

				// Tangential distortion.
				UndistortedV.X += P2 * (R2 + 2 * V2.X) + 2 * P1 * V.X * V.Y;
				UndistortedV.Y += P1 * (R2 + 2 * V2.Y) + 2 * P2 * V.X * V.Y;

				// Returns engine V.
				return UndistortedV * FVector2D(1, -1);
			}

			/** Compiles the camera model. */
			float FFooCameraModel::GetUndistortOverscanFactor(
				float DistortedHorizontalFOV, float DistortedAspectRatio) const
			{
				// If the lens distortion model is identity, then early return 1.
				if (*this == FFooCameraModel())
				{
					return 1.0f;
				}

				float TanHalfDistortedHorizontalFOV = FMath::Tan(DistortedHorizontalFOV * 0.5f);

				// Get the position in the view space at z'=1 of different key point in the distorted Viewport UV coordinate system.
				// This very approximative to know the required overscan scale factor of the undistorted viewport, but works really well in practice.
				//
				// Undistorted UV position in the view space:
				// ^ View space's Y
				// |
				// 0 1 2
				//
				// 7 0 3 --> View space's X
				//
				// 6 5 4
				FVector2D UndistortCornerPos0 = LensUndistortViewportUVIntoViewSpace(
					*this, TanHalfDistortedHorizontalFOV, DistortedAspectRatio, FVector2D(0.0f, 0.0f));
				FVector2D UndistortCornerPos1 = LensUndistortViewportUVIntoViewSpace(
					*this, TanHalfDistortedHorizontalFOV, DistortedAspectRatio, FVector2D(0.5f, 0.0f));
				FVector2D UndistortCornerPos2 = LensUndistortViewportUVIntoViewSpace(
					*this, TanHalfDistortedHorizontalFOV, DistortedAspectRatio, FVector2D(1.0f, 0.0f));
				FVector2D UndistortCornerPos3 = LensUndistortViewportUVIntoViewSpace(
					*this, TanHalfDistortedHorizontalFOV, DistortedAspectRatio, FVector2D(1.0f, 0.5f));
				FVector2D UndistortCornerPos4 = LensUndistortViewportUVIntoViewSpace(
					*this, TanHalfDistortedHorizontalFOV, DistortedAspectRatio, FVector2D(1.0f, 1.0f));
				FVector2D UndistortCornerPos5 = LensUndistortViewportUVIntoViewSpace(
					*this, TanHalfDistortedHorizontalFOV, DistortedAspectRatio, FVector2D(0.5f, 1.0f));
				FVector2D UndistortCornerPos6 = LensUndistortViewportUVIntoViewSpace(
					*this, TanHalfDistortedHorizontalFOV, DistortedAspectRatio, FVector2D(0.0f, 1.0f));
				FVector2D UndistortCornerPos7 = LensUndistortViewportUVIntoViewSpace(
					*this, TanHalfDistortedHorizontalFOV, DistortedAspectRatio, FVector2D(0.0f, 0.5f));

				// Find min and max of the inner square of undistorted Viewport in the view space at z'=1.
				FVector2D MinInnerViewportRect;
				FVector2D MaxInnerViewportRect;
				MinInnerViewportRect.X = FMath::Max3(UndistortCornerPos0.X, UndistortCornerPos6.X, UndistortCornerPos7.X);
				MinInnerViewportRect.Y = FMath::Max3(UndistortCornerPos4.Y, UndistortCornerPos5.Y, UndistortCornerPos6.Y);
				MaxInnerViewportRect.X = FMath::Min3(UndistortCornerPos2.X, UndistortCornerPos3.X, UndistortCornerPos4.X);
				MaxInnerViewportRect.Y = FMath::Min3(UndistortCornerPos0.Y, UndistortCornerPos1.Y, UndistortCornerPos2.Y);

				check(MinInnerViewportRect.X < 0.f);
				check(MinInnerViewportRect.Y < 0.f);
				check(MaxInnerViewportRect.X > 0.f);
				check(MaxInnerViewportRect.Y > 0.f);

				// Compute tan(VerticalFOV * 0.5)
				float TanHalfDistortedVerticalFOV = TanHalfDistortedHorizontalFOV / DistortedAspectRatio;

				// Compute the required un-distorted viewport scale on each axis.
				FVector2D ViewportScaleUpFactorPerViewAxis = 0.5 * FVector2D(
					TanHalfDistortedHorizontalFOV / FMath::Max(-MinInnerViewportRect.X, MaxInnerViewportRect.X),
					TanHalfDistortedVerticalFOV / FMath::Max(-MinInnerViewportRect.Y, MaxInnerViewportRect.Y));

				// Scale up by 2% more the undistorted viewport size in the view space to work
				// around the fact that odd undistorted positions might not exactly be at the minimal
				// in case of a tangential distorted barrel lens distortion.
				const float ViewportScaleUpConstMultiplier = 1.02f;
				return FMath::Max(ViewportScaleUpFactorPerViewAxis.X, ViewportScaleUpFactorPerViewAxis.Y) * ViewportScaleUpConstMultiplier;
			}

			void FFooCameraModel::DrawUVDisplacementToRenderTarget(
				UWorld* World,
				float DistortedHorizontalFOV,
				float DistortedAspectRatio,
				float UndistortOverscanFactor,
				UTextureRenderTarget2D* OutputRenderTarget,
				float OutputMultiply,
				float OutputAdd) const
			{
				check(IsInGameThread());

				// Compiles the camera model to know the overscan scale factor.
				float TanHalfUndistortedHorizontalFOV = FMath::Tan(DistortedHorizontalFOV * 0.5f) * UndistortOverscanFactor;
				float TanHalfUndistortedVerticalFOV = TanHalfUndistortedHorizontalFOV / DistortedAspectRatio;

				// Output.
				FCompiledCameraModel CompiledCameraModel;
				CompiledCameraModel.OriginalCameraModel = *this;

				CompiledCameraModel.DistortedCameraMatrix.X = 1.0f / TanHalfUndistortedHorizontalFOV;
				CompiledCameraModel.DistortedCameraMatrix.Y = 1.0f / TanHalfUndistortedVerticalFOV;
				CompiledCameraModel.DistortedCameraMatrix.Z = 0.5f;
				CompiledCameraModel.DistortedCameraMatrix.W = 0.5f;

				CompiledCameraModel.UndistortedCameraMatrix.X = F.X;
				CompiledCameraModel.UndistortedCameraMatrix.Y = F.Y * DistortedAspectRatio;
				CompiledCameraModel.UndistortedCameraMatrix.Z = C.X;
				CompiledCameraModel.UndistortedCameraMatrix.W = C.Y;

				CompiledCameraModel.OutputMultiplyAndAdd.X = OutputMultiply;
				CompiledCameraModel.OutputMultiplyAndAdd.Y = OutputAdd;

				const FName TextureRenderTargetName = OutputRenderTarget->GetFName();
				FTextureRenderTargetResource* TextureRenderTargetResource = OutputRenderTarget->GameThread_GetRenderTargetResource();

				ERHIFeatureLevel::Type FeatureLevel = World->Scene->GetFeatureLevel();

				ENQUEUE_RENDER_COMMAND(CaptureCommand)(
					[CompiledCameraModel, TextureRenderTargetResource, TextureRenderTargetName, FeatureLevel](FRHICommandListImmediate& RHICmdList)
					{
						DrawUVDisplacementToRenderTarget_RenderThread(
							RHICmdList,
							CompiledCameraModel,
							TextureRenderTargetName,
							TextureRenderTargetResource,
							FeatureLevel);
					}
				);
			}

#include "LensDistortionAPI.h"
			#include "Classes/Engine/TextureRenderTarget2D.h"
			#include "Classes/Engine/World.h"
			#include "Public/GlobalShader.h"
			#include "Public/PipelineStateCache.h"
			#include "Public/RHIStaticStates.h"
			#include "Public/SceneUtils.h"
			#include "Public/SceneInterface.h"
			#include "Public/ShaderParameterUtils.h"

static const uint32 kGridSubdivisionX = 32;
			static const uint32 kGridSubdivisionY = 16;

/**
			* Internal intermediary structure derived from FFooCameraModel by the game thread
			* to hand to the render thread.
			*/
			struct FCompiledCameraModel
			{
				/** Orignal camera model that has generated this compiled model. */
				FFooCameraModel OriginalCameraModel;

/** Camera matrices of the lens distortion for the undistorted and distorted render.
				* XY holds the scales factors, ZW holds the translates.
				*/
				FVector4 DistortedCameraMatrix;
				FVector4 UndistortedCameraMatrix;

/** Output multiply and add of the channel to the render target. */
				FVector2D OutputMultiplyAndAdd;
			};

/** Undistorts top left originated viewport UV into the view space (x', y', z'=1.f) */
			static FVector2D LensUndistortViewportUVIntoViewSpace(
				const FFooCameraModel& CameraModel,
				float TanHalfDistortedHorizontalFOV, float DistortedAspectRatio,
				FVector2D DistortedViewportUV)
			{
				FVector2D AspectRatioAwareF = CameraModel.F * FVector2D(1, -DistortedAspectRatio);
				return CameraModel.UndistortNormalizedViewPosition((DistortedViewportUV - CameraModel.C) / AspectRatioAwareF);
			}

class FLensDistortionUVGenerationShader : public FGlobalShader
			{
			public:
				static bool ShouldCache(EShaderPlatform Platform)
				{
					return IsFeatureLevelSupported(Platform, ERHIFeatureLevel::SM4);
				}

static void ModifyCompilationEnvironment(EShaderPlatform Platform, FShaderCompilerEnvironment& OutEnvironment)
				{
					FGlobalShader::ModifyCompilationEnvironment(Platform, OutEnvironment);
					OutEnvironment.SetDefine(TEXT("GRID_SUBDIVISION_X"), kGridSubdivisionX);
					OutEnvironment.SetDefine(TEXT("GRID_SUBDIVISION_Y"), kGridSubdivisionY);
				}

FLensDistortionUVGenerationShader() {}

FLensDistortionUVGenerationShader(const ShaderMetaType::CompiledShaderInitializerType& Initializer)
					: FGlobalShader(Initializer)
				{
					PixelUVSize.Bind(Initializer.ParameterMap, TEXT("PixelUVSize"));
					RadialDistortionCoefs.Bind(Initializer.ParameterMap, TEXT("RadialDistortionCoefs"));
					TangentialDistortionCoefs.Bind(Initializer.ParameterMap, TEXT("TangentialDistortionCoefs"));
					DistortedCameraMatrix.Bind(Initializer.ParameterMap, TEXT("DistortedCameraMatrix"));
					UndistortedCameraMatrix.Bind(Initializer.ParameterMap, TEXT("UndistortedCameraMatrix"));
					OutputMultiplyAndAdd.Bind(Initializer.ParameterMap, TEXT("OutputMultiplyAndAdd"));
				}

template<typename TShaderRHIParamRef>
				void SetParameters(
					FRHICommandListImmediate& RHICmdList,
					const TShaderRHIParamRef ShaderRHI,
					const FCompiledCameraModel& CompiledCameraModel,
					const FIntPoint& DisplacementMapResolution)
				{
					FVector2D PixelUVSizeValue(
						1.f / float(DisplacementMapResolution.X), 1.f / float(DisplacementMapResolution.Y));
					FVector RadialDistortionCoefsValue(
						CompiledCameraModel.OriginalCameraModel.K1,
						CompiledCameraModel.OriginalCameraModel.K2,
						CompiledCameraModel.OriginalCameraModel.K3);
					FVector2D TangentialDistortionCoefsValue(
						CompiledCameraModel.OriginalCameraModel.P1,
						CompiledCameraModel.OriginalCameraModel.P2);

SetShaderValue(RHICmdList, ShaderRHI, PixelUVSize, PixelUVSizeValue);
					SetShaderValue(RHICmdList, ShaderRHI, DistortedCameraMatrix, CompiledCameraModel.DistortedCameraMatrix);
					SetShaderValue(RHICmdList, ShaderRHI, UndistortedCameraMatrix, CompiledCameraModel.UndistortedCameraMatrix);
					SetShaderValue(RHICmdList, ShaderRHI, RadialDistortionCoefs, RadialDistortionCoefsValue);
					SetShaderValue(RHICmdList, ShaderRHI, TangentialDistortionCoefs, TangentialDistortionCoefsValue);
					SetShaderValue(RHICmdList, ShaderRHI, OutputMultiplyAndAdd, CompiledCameraModel.OutputMultiplyAndAdd);
				}

virtual bool Serialize(FArchive& Ar) override
				{
					bool bShaderHasOutdatedParameters = FGlobalShader::Serialize(Ar);
					Ar << PixelUVSize << RadialDistortionCoefs << TangentialDistortionCoefs << DistortedCameraMatrix << UndistortedCameraMatrix << OutputMultiplyAndAdd;
					return bShaderHasOutdatedParameters;
				}

private:
				FShaderParameter PixelUVSize;
				FShaderParameter RadialDistortionCoefs;
				FShaderParameter TangentialDistortionCoefs;
				FShaderParameter DistortedCameraMatrix;
				FShaderParameter UndistortedCameraMatrix;
				FShaderParameter OutputMultiplyAndAdd;

};

class FLensDistortionUVGenerationVS : public FLensDistortionUVGenerationShader
			{
				DECLARE_SHADER_TYPE(FLensDistortionUVGenerationVS, Global);

public:

/** Default constructor. */
				FLensDistortionUVGenerationVS() {}

/** Initialization constructor. */
				FLensDistortionUVGenerationVS(const ShaderMetaType::CompiledShaderInitializerType& Initializer)
					: FLensDistortionUVGenerationShader(Initializer)
				{
				}
			};

class FLensDistortionUVGenerationPS : public FLensDistortionUVGenerationShader
			{
				DECLARE_SHADER_TYPE(FLensDistortionUVGenerationPS, Global);

public:

/** Default constructor. */
				FLensDistortionUVGenerationPS() {}

/** Initialization constructor. */
				FLensDistortionUVGenerationPS(const ShaderMetaType::CompiledShaderInitializerType& Initializer)
					: FLensDistortionUVGenerationShader(Initializer)
				{ }
			};

IMPLEMENT_SHADER_TYPE(, FLensDistortionUVGenerationVS, TEXT("/Plugin/Foo/Private/MyShader.usf"), TEXT("MainVS"), SF_Vertex)
			IMPLEMENT_SHADER_TYPE(, FLensDistortionUVGenerationPS, TEXT("/Plugin/Foo/Private/MyShader.usf"), TEXT("MainPS"), SF_Pixel)

static void DrawUVDisplacementToRenderTarget_RenderThread(
				FRHICommandListImmediate& RHICmdList,
				const FCompiledCameraModel& CompiledCameraModel,
				const FName& TextureRenderTargetName,
				FTextureRenderTargetResource* OutTextureRenderTargetResource,
				ERHIFeatureLevel::Type FeatureLevel)
			{
				check(IsInRenderingThread());

#if WANTS_DRAW_MESH_EVENTS
				FString EventName;
				TextureRenderTargetName.ToString(EventName);
				SCOPED_DRAW_EVENTF(RHICmdList, SceneCapture, TEXT("LensDistortionDisplacementGeneration %s"), *EventName);
			#else
				SCOPED_DRAW_EVENT(RHICmdList, DrawUVDisplacementToRenderTarget_RenderThread);
			#endif

// Set render target.
				SetRenderTarget(
					RHICmdList,
					OutTextureRenderTargetResource->GetRenderTargetTexture(),
					FTextureRHIRef(),
					ESimpleRenderTargetMode::EUninitializedColorAndDepth,
					FExclusiveDepthStencil::DepthNop_StencilNop);

FIntPoint DisplacementMapResolution(OutTextureRenderTargetResource->GetSizeX(), OutTextureRenderTargetResource->GetSizeY());

// Update viewport.
				RHICmdList.SetViewport(
					0, 0, 0.f,
					DisplacementMapResolution.X, DisplacementMapResolution.Y, 1.f);

// Get shaders.
				TShaderMap<FGlobalShaderType>* GlobalShaderMap = GetGlobalShaderMap(FeatureLevel);
				TShaderMapRef< FLensDistortionUVGenerationVS > VertexShader(GlobalShaderMap);
				TShaderMapRef< FLensDistortionUVGenerationPS > PixelShader(GlobalShaderMap);

// Set the graphic pipeline state.
				FGraphicsPipelineStateInitializer GraphicsPSOInit;
				RHICmdList.ApplyCachedRenderTargets(GraphicsPSOInit);
				GraphicsPSOInit.DepthStencilState = TStaticDepthStencilState<false, CF_Always>::GetRHI();
				GraphicsPSOInit.BlendState = TStaticBlendState<>::GetRHI();
				GraphicsPSOInit.RasterizerState = TStaticRasterizerState<>::GetRHI();
				GraphicsPSOInit.PrimitiveType = PT_TriangleList;
				GraphicsPSOInit.BoundShaderState.VertexDeclarationRHI = GetVertexDeclarationFVector4();
				GraphicsPSOInit.BoundShaderState.VertexShaderRHI = GETSAFERHISHADER_VERTEX(*VertexShader);
				GraphicsPSOInit.BoundShaderState.PixelShaderRHI = GETSAFERHISHADER_PIXEL(*PixelShader);
				SetGraphicsPipelineState(RHICmdList, GraphicsPSOInit);

// Update viewport.
				RHICmdList.SetViewport(
					0, 0, 0.f,
					OutTextureRenderTargetResource->GetSizeX(), OutTextureRenderTargetResource->GetSizeY(), 1.f);

// Update shader uniform parameters.
				VertexShader->SetParameters(RHICmdList, VertexShader->GetVertexShader(), CompiledCameraModel, DisplacementMapResolution);
				PixelShader->SetParameters(RHICmdList, PixelShader->GetPixelShader(), CompiledCameraModel, DisplacementMapResolution);

// Draw grid.
				uint32 PrimitiveCount = kGridSubdivisionX * kGridSubdivisionY * 2;
				RHICmdList.DrawPrimitive(PT_TriangleList, 0, PrimitiveCount, 1);

// Resolve render target.
				RHICmdList.CopyToResolveTarget(
					OutTextureRenderTargetResource->GetRenderTargetTexture(),
					OutTextureRenderTargetResource->TextureRHI,
					false, FResolveParams());
			}

FVector2D FFooCameraModel::UndistortNormalizedViewPosition(FVector2D EngineV) const
			{
				// Engine view space -> standard view space.
				FVector2D V = FVector2D(1, -1) * EngineV;

FVector2D V2 = V * V;
				float R2 = V2.X + V2.Y;

// Radial distortion (extra parenthesis to match MF_Undistortion.uasset).
				FVector2D UndistortedV = V * (1.0 + (R2 * K1 + (R2 * R2) * K2 + (R2 * R2 * R2) * K3));

// Tangential distortion.
				UndistortedV.X += P2 * (R2 + 2 * V2.X) + 2 * P1 * V.X * V.Y;
				UndistortedV.Y += P1 * (R2 + 2 * V2.Y) + 2 * P2 * V.X * V.Y;

// Returns engine V.
				return UndistortedV * FVector2D(1, -1);
			}

/** Compiles the camera model. */
			float FFooCameraModel::GetUndistortOverscanFactor(
				float DistortedHorizontalFOV, float DistortedAspectRatio) const
			{
				// If the lens distortion model is identity, then early return 1.
				if (*this == FFooCameraModel())
				{
					return 1.0f;
				}

float TanHalfDistortedHorizontalFOV = FMath::Tan(DistortedHorizontalFOV * 0.5f);

// Get the position in the view space at z'=1 of different key point in the distorted Viewport UV coordinate system.
				// This very approximative to know the required overscan scale factor of the undistorted viewport, but works really well in practice.
				//
				// Undistorted UV position in the view space:
				// ^ View space's Y
				// |
				// 0 1 2
				//
				// 7 0 3 --> View space's X
				//
				// 6 5 4
				FVector2D UndistortCornerPos0 = LensUndistortViewportUVIntoViewSpace(
					*this, TanHalfDistortedHorizontalFOV, DistortedAspectRatio, FVector2D(0.0f, 0.0f));
				FVector2D UndistortCornerPos1 = LensUndistortViewportUVIntoViewSpace(
					*this, TanHalfDistortedHorizontalFOV, DistortedAspectRatio, FVector2D(0.5f, 0.0f));
				FVector2D UndistortCornerPos2 = LensUndistortViewportUVIntoViewSpace(
					*this, TanHalfDistortedHorizontalFOV, DistortedAspectRatio, FVector2D(1.0f, 0.0f));
				FVector2D UndistortCornerPos3 = LensUndistortViewportUVIntoViewSpace(
					*this, TanHalfDistortedHorizontalFOV, DistortedAspectRatio, FVector2D(1.0f, 0.5f));
				FVector2D UndistortCornerPos4 = LensUndistortViewportUVIntoViewSpace(
					*this, TanHalfDistortedHorizontalFOV, DistortedAspectRatio, FVector2D(1.0f, 1.0f));
				FVector2D UndistortCornerPos5 = LensUndistortViewportUVIntoViewSpace(
					*this, TanHalfDistortedHorizontalFOV, DistortedAspectRatio, FVector2D(0.5f, 1.0f));
				FVector2D UndistortCornerPos6 = LensUndistortViewportUVIntoViewSpace(
					*this, TanHalfDistortedHorizontalFOV, DistortedAspectRatio, FVector2D(0.0f, 1.0f));
				FVector2D UndistortCornerPos7 = LensUndistortViewportUVIntoViewSpace(
					*this, TanHalfDistortedHorizontalFOV, DistortedAspectRatio, FVector2D(0.0f, 0.5f));

// Find min and max of the inner square of undistorted Viewport in the view space at z'=1.
				FVector2D MinInnerViewportRect;
				FVector2D MaxInnerViewportRect;
				MinInnerViewportRect.X = FMath::Max3(UndistortCornerPos0.X, UndistortCornerPos6.X, UndistortCornerPos7.X);
				MinInnerViewportRect.Y = FMath::Max3(UndistortCornerPos4.Y, UndistortCornerPos5.Y, UndistortCornerPos6.Y);
				MaxInnerViewportRect.X = FMath::Min3(UndistortCornerPos2.X, UndistortCornerPos3.X, UndistortCornerPos4.X);
				MaxInnerViewportRect.Y = FMath::Min3(UndistortCornerPos0.Y, UndistortCornerPos1.Y, UndistortCornerPos2.Y);

check(MinInnerViewportRect.X < 0.f);
				check(MinInnerViewportRect.Y < 0.f);
				check(MaxInnerViewportRect.X > 0.f);
				check(MaxInnerViewportRect.Y > 0.f);

// Compute tan(VerticalFOV * 0.5)
				float TanHalfDistortedVerticalFOV = TanHalfDistortedHorizontalFOV / DistortedAspectRatio;

// Compute the required un-distorted viewport scale on each axis.
				FVector2D ViewportScaleUpFactorPerViewAxis = 0.5 * FVector2D(
					TanHalfDistortedHorizontalFOV / FMath::Max(-MinInnerViewportRect.X, MaxInnerViewportRect.X),
					TanHalfDistortedVerticalFOV / FMath::Max(-MinInnerViewportRect.Y, MaxInnerViewportRect.Y));

// Scale up by 2% more the undistorted viewport size in the view space to work
				// around the fact that odd undistorted positions might not exactly be at the minimal
				// in case of a tangential distorted barrel lens distortion.
				const float ViewportScaleUpConstMultiplier = 1.02f;
				return FMath::Max(ViewportScaleUpFactorPerViewAxis.X, ViewportScaleUpFactorPerViewAxis.Y) * ViewportScaleUpConstMultiplier;
			}

void FFooCameraModel::DrawUVDisplacementToRenderTarget(
				UWorld* World,
				float DistortedHorizontalFOV,
				float DistortedAspectRatio,
				float UndistortOverscanFactor,
				UTextureRenderTarget2D* OutputRenderTarget,
				float OutputMultiply,
				float OutputAdd) const
			{
				check(IsInGameThread());

// Compiles the camera model to know the overscan scale factor.
				float TanHalfUndistortedHorizontalFOV = FMath::Tan(DistortedHorizontalFOV * 0.5f) * UndistortOverscanFactor;
				float TanHalfUndistortedVerticalFOV = TanHalfUndistortedHorizontalFOV / DistortedAspectRatio;

// Output.
				FCompiledCameraModel CompiledCameraModel;
				CompiledCameraModel.OriginalCameraModel = *this;

CompiledCameraModel.DistortedCameraMatrix.X = 1.0f / TanHalfUndistortedHorizontalFOV;
				CompiledCameraModel.DistortedCameraMatrix.Y = 1.0f / TanHalfUndistortedVerticalFOV;
				CompiledCameraModel.DistortedCameraMatrix.Z = 0.5f;
				CompiledCameraModel.DistortedCameraMatrix.W = 0.5f;

CompiledCameraModel.UndistortedCameraMatrix.X = F.X;
				CompiledCameraModel.UndistortedCameraMatrix.Y = F.Y * DistortedAspectRatio;
				CompiledCameraModel.UndistortedCameraMatrix.Z = C.X;
				CompiledCameraModel.UndistortedCameraMatrix.W = C.Y;

CompiledCameraModel.OutputMultiplyAndAdd.X = OutputMultiply;
				CompiledCameraModel.OutputMultiplyAndAdd.Y = OutputAdd;

const FName TextureRenderTargetName = OutputRenderTarget->GetFName();
				FTextureRenderTargetResource* TextureRenderTargetResource = OutputRenderTarget->GameThread_GetRenderTargetResource();

ERHIFeatureLevel::Type FeatureLevel = World->Scene->GetFeatureLevel();

ENQUEUE_RENDER_COMMAND(CaptureCommand)(
					[CompiledCameraModel, TextureRenderTargetResource, TextureRenderTargetName, FeatureLevel](FRHICommandListImmediate& RHICmdList)
					{
						DrawUVDisplacementToRenderTarget_RenderThread(
							RHICmdList,
							CompiledCameraModel,
							TextureRenderTargetName,
							TextureRenderTargetResource,
							FeatureLevel);
					}
				);
			}

Finally, in the LensDistortionRendering.cpp file, at lines 155 and 156, change the following two lines of code to point to the new MyShader.USF file that was created earlier.

	Change:

	* IMPLEMENT_SHADER_TYPE(, FLensDistortionUVGenerationVS, TEXT("/Plugin/LensDistortion/Private/UVGeneration.usf"), TEXT("MainVS"), SF_Vertex)

	To:

	* IMPLEMENT_SHADER_TYPE(, FLensDistortionUVGenerationVS, TEXT("/Plugin/Foo/Private/MyShader.usf"), TEXT("MainVS"), SF_Vertex)

	Change:

	* IMPLEMENT_SHADER_TYPE(, FLensDistortionUVGenerationPS, TEXT("/Plugin/LensDistortion/Private/UVGeneration.usf"), TEXT("MainPS"), SF_Pixel)

	To:

	* IMPLEMENT_SHADER_TYPE(, FLensDistortionUVGenerationPS, TEXT("/Plugin/Foo/Private/MyShader.usf"), TEXT("MainPS"), SF_Pixel)

Now, go to the Foo/Source folder and open up the Foo.Build.cs file and in the Foo.Build.cs under the PublicDependencyModuleNames.AddRange section add the following lines of code:

			PublicDependencyModuleNames.AddRange(
			new string[]
			{
				"Core",
				"RenderCore",
				"ShaderCore",
				"RHI",
				// ... add other public dependencies that you statically link with here ...
			}
			);

Then, in the PrivateDependencyModuleNames.AddRange section of Foo.Build.cs remove Slate and SlateCore and when completed your Foo.Build.cs file should look like this:

		// Copyright 1998-2018 Epic Games, Inc. All Rights Reserved.

		using UnrealBuildTool;

		public class Foo : ModuleRules
		{
			public Foo(ReadOnlyTargetRules Target) : base(Target)
			{
				PCHUsage = ModuleRules.PCHUsageMode.UseExplicitOrSharedPCHs;

				PublicIncludePaths.AddRange(
					new string[] {
						"Foo/Public"
						// ... add public include paths required here ...
					}
					);
				PrivateIncludePaths.AddRange(
					new string[] {
						"Foo/Private",
						// ... add other private include paths required here ...
					}
					);

				PublicDependencyModuleNames.AddRange(
					new string[]
					{
						"Core",
						"RenderCore",
						"ShaderCore",
						"RHI",
						// ... add other public dependencies that you statically link with here ...
					}
					);
				PrivateDependencyModuleNames.AddRange(
					new string[]
					{
						"CoreUObject",
						"Engine",
						// ... add private dependencies that you statically link with here ...
					}
					);

				DynamicallyLoadedModuleNames.AddRange(
					new string[]
					{
						// ... add any modules that your module loads dynamically here ...
					}
					);
			}
		}

using UnrealBuildTool;

public class Foo : ModuleRules
		{
			public Foo(ReadOnlyTargetRules Target) : base(Target)
			{
				PCHUsage = ModuleRules.PCHUsageMode.UseExplicitOrSharedPCHs;

PublicIncludePaths.AddRange(
					new string[] {
						"Foo/Public"
						// ... add public include paths required here ...
					}
					);
				PrivateIncludePaths.AddRange(
					new string[] {
						"Foo/Private",
						// ... add other private include paths required here ...
					}
					);

PublicDependencyModuleNames.AddRange(
					new string[]
					{
						"Core",
						"RenderCore",
						"ShaderCore",
						"RHI",
						// ... add other public dependencies that you statically link with here ...
					}
					);
				PrivateDependencyModuleNames.AddRange(
					new string[]
					{
						"CoreUObject",
						"Engine",
						// ... add private dependencies that you statically link with here ...
					}
					);

DynamicallyLoadedModuleNames.AddRange(
					new string[]
					{
						// ... add any modules that your module loads dynamically here ...
					}
					);
			}
		}

Re-launch your projects Visual Studio solution file and then recompile your project by pressing CRTL + 5 and when the compile has completed, press F5 to launch the UE4 Editor.
When the UE4 Editor finishes loading, go to the Plugins manager by going to Edit > Plugins.
Inside of the Plugins manager, scroll down to the bottom and look for the Project section and in this section, you should see your Plugin.

If your plug is not enabled, enable it by clicking on the checkmark box next to its name and re-start the UE4 editor.

To check to make sure everything is there, open up the Level Blueprint and right - click in the Event Graph inputting Foo into the search box. Once that is complete, you should now see all of the items that were added to the Foo Camera category.

Click for full image.

End Result

Congratulations, you have now successfully recreated and compiled a new version of the Lense Distortion UE4 plugin. In the next step, you will learn how to invoke this new global shader from Blueprints and also see how it distorts Render Targets.

2 - Blueprint Setup

With the Plugin now verified to be working, in the following section you will be shown how to call the global shader using Blueprints.

To see how this works, right-click in the Content Browser and create a new Blueprint Class that has Actor as its parent class with the name, DrawUVDisToRenderTarget.
Next, create a new Render Target called RT_00 and a new Material called MAT_RT.
Open up MAT_RT Material and then add the RT_00 Render Target to the Material Graph, connecting its output to the Base Color input on the Main Material Node, pressing the Apply and Save button when done.

Click for full image.

Next, open up the DrawUVDisToRenderTarget Blueprint and create/add the following variables and nodes to the Event Graph.

Variables	Default Value
K1	1.0
K2	1.0
inc	1.0

Nodes	Default Value
W	N/A
S	N/A
Event Tick	N/A
Draw UVDisplacement to Render Target	Input 1 into FOV, Aspect Ratio, and Overscan Factor
Make FooCameraModel	N/A
Clear Render Target 2D	N/A

To easily demonstrate how the Draw UVDisplacement to Render Target will warp the supplied render target, you will need to setup your up Blueprint so that the values input into the K1 and K2 inputs on the Draw UVDisplacement to Render Target node can be increase or decrease by the press of a button. To accomplish this, setup the nodes in the Event Graph so that they match the following image:

BEGIN OBJECT Begin Object Class=/Script/BlueprintGraph.K2Node_CallFunction Name="K2Node_CallFunction_415" FunctionReference=(MemberParent=Class'/Script/Foo.FooBlueprintLibrary',MemberName="DrawUVDisplacementToRenderTarget") NodePosX=-320 NodePosY=320 NodeGuid=6A47664B4ECC988FD0BC3083A247DEE4 CustomProperties Pin (PinId=37A50945406550EE210602B9EDA46A00,PinName="execute",PinToolTip="\nExec",PinType.PinCategory="exec",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,LinkedTo=(K2Node_CallFunction_416 90ED15F94550FFA4BBC36CA3442B9E34,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,) CustomProperties Pin (PinId=A229BA4C4B3AB1E96CD8FCB7337B7E81,PinName="then",PinToolTip="\nExec",Direction="EGPD_Output",PinType.PinCategory="exec",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,) CustomProperties Pin (PinId=074FA9FC4524DDA34DE5FD9182A32C96,PinName="self",PinFriendlyName=NSLOCTEXT("K2Node", "Target", "Target"),PinToolTip="Target\nFoo Blueprint Library Object Reference",PinType.PinCategory="object",PinType.PinSubCategory="",PinType.PinSubCategoryObject=Class'/Script/Foo.FooBlueprintLibrary',PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,DefaultObject="/Script/Foo.Default__FooBlueprintLibrary",PersistentGuid=00000000000000000000000000000000,bHidden=True,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,) CustomProperties Pin (PinId=E7AD9BC443D9AE707AB792B6E1B4C883,PinName="WorldContextObject",PinToolTip="World Context Object\nObject Object Reference",PinType.PinCategory="object",PinType.PinSubCategory="",PinType.PinSubCategoryObject=Class'/Script/CoreUObject.Object',PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PersistentGuid=00000000000000000000000000000000,bHidden=True,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,) CustomProperties Pin (PinId=F2AB8E6441774533823DD2A413DEF544,PinName="CameraModel",PinToolTip="Camera Model\nFoo Camera Model Structure (by ref)",PinType.PinCategory="struct",PinType.PinSubCategory="",PinType.PinSubCategoryObject=ScriptStruct'/Script/Foo.FooCameraModel',PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=True,PinType.bIsConst=False,PinType.bIsWeakPointer=False,LinkedTo=(K2Node_MakeStruct_96 9EB96E474F8D2725864D30B6ECDFF41F,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=True,bAdvancedView=False,bOrphanedPin=False,) CustomProperties Pin (PinId=997B44ED47F8AFC32E1E3D8D076096B4,PinName="DistortedHorizontalFOV",PinToolTip="Distorted Horizontal FOV\nFloat\n\nThe desired horizontal FOV in the distorted render.",PinType.PinCategory="float",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,DefaultValue="1",AutogeneratedDefaultValue="0.0",PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,) CustomProperties Pin (PinId=7D39B8B24ECD165F87E3AE8A7B13FA35,PinName="DistortedAspectRatio",PinToolTip="Distorted Aspect Ratio\nFloat\n\nThe desired aspect ratio of the distorted render.",PinType.PinCategory="float",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,DefaultValue="1",AutogeneratedDefaultValue="0.0",PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,) CustomProperties Pin (PinId=FBC9F81D4E3E519A67B8DB9F8DF3EE82,PinName="UndistortOverscanFactor",PinToolTip="Undistort Overscan Factor\nFloat\n\nThe factor of the overscan for the undistorted render.",PinType.PinCategory="float",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,DefaultValue="1",AutogeneratedDefaultValue="0.0",PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,) CustomProperties Pin (PinId=F7F38CFD47D34A5FE4DE3A9FEE2F2B82,PinName="OutputRenderTarget",PinToolTip="Output Render Target\nTexture Render Target 2D Object Reference\n\nThe render target to draw to. Don't necessarily need to have same resolution or aspect ratio as distorted render.",PinType.PinCategory="object",PinType.PinSubCategory="",PinType.PinSubCategoryObject=Class'/Script/Engine.TextureRenderTarget2D',PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,DefaultObject="/Game/RT_00.RT_00",PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,) CustomProperties Pin (PinId=3EA265BD4D6E66170D25E4B760B8C4B9,PinName="OutputMultiply",PinToolTip="Output Multiply\nFloat\n\nThe multiplication factor applied on the displacement.",PinType.PinCategory="float",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,DefaultValue="0.500000",AutogeneratedDefaultValue="0.500000",PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,) CustomProperties Pin (PinId=41D4A4834F5BF73382730A915976A8AA,PinName="OutputAdd",PinToolTip="Output Add\nFloat\n\nValue added to the multiplied displacement before storing into the output render target.",PinType.PinCategory="float",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,DefaultValue="0.500000",AutogeneratedDefaultValue="0.500000",PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,) End Object Begin Object Class=/Script/BlueprintGraph.K2Node_MakeStruct Name="K2Node_MakeStruct_96" bMadeAfterOverridePinRemoval=True ShowPinForProperties(0)=(PropertyName="K1",PropertyFriendlyName="K1",PropertyTooltip=NSLOCTEXT("", "AAE0E1744CF690D4533F5B8735A92401", "Radial parameter #1."),CategoryName="Lens Distortion|Camera Model",bShowPin=True,bCanToggleVisibility=True,bPropertyIsCustomized=True) ShowPinForProperties(1)=(PropertyName="K2",PropertyFriendlyName="K2",PropertyTooltip=NSLOCTEXT("", "21EF07AD4C81C729E14C25902E1EC1D4", "Radial parameter #2."),CategoryName="Lens Distortion|Camera Model",bShowPin=True,bCanToggleVisibility=True,bPropertyIsCustomized=True) ShowPinForProperties(2)=(PropertyName="K3",PropertyFriendlyName="K3",PropertyTooltip=NSLOCTEXT("", "51EE62C949CD22B416EAF4932244E40C", "Radial parameter #3."),CategoryName="Lens Distortion|Camera Model",bShowPin=True,bCanToggleVisibility=True,bPropertyIsCustomized=True) ShowPinForProperties(3)=(PropertyName="P1",PropertyFriendlyName="P1",PropertyTooltip=NSLOCTEXT("", "739015D3419D714685C9AB810122ECC7", "Tangential parameter #1."),CategoryName="Lens Distortion|Camera Model",bShowPin=True,bCanToggleVisibility=True,bPropertyIsCustomized=True) ShowPinForProperties(4)=(PropertyName="P2",PropertyFriendlyName="P2",PropertyTooltip=NSLOCTEXT("", "294AD7ED4093BCA7AFBF01B8EC0C9A93", "Tangential parameter #2."),CategoryName="Lens Distortion|Camera Model",bShowPin=True,bCanToggleVisibility=True,bPropertyIsCustomized=True) ShowPinForProperties(5)=(PropertyName="F",PropertyFriendlyName="F",PropertyTooltip=NSLOCTEXT("", "A99C20144CE2EBB9DD0A62B672BE148D", "Camera matrix's Fx and Fy."),CategoryName="Lens Distortion|Camera Model",bShowPin=True,bCanToggleVisibility=True,bPropertyIsCustomized=True) ShowPinForProperties(6)=(PropertyName="C",PropertyFriendlyName="C",PropertyTooltip=NSLOCTEXT("", "68542CDC4C0F33F2FA893981BFBFAF16", "Camera matrix's Cx and Cy."),CategoryName="Lens Distortion|Camera Model",bShowPin=True,bCanToggleVisibility=True,bPropertyIsCustomized=True) StructType=ScriptStruct'/Script/Foo.FooCameraModel' NodePosX=-656 NodePosY=384 AdvancedPinDisplay=Shown NodeGuid=891CB1A843FED8C70EA3B28B103CB264 CustomProperties Pin (PinId=9EB96E474F8D2725864D30B6ECDFF41F,PinName="FooCameraModel",Direction="EGPD_Output",PinType.PinCategory="struct",PinType.PinSubCategory="",PinType.PinSubCategoryObject=ScriptStruct'/Script/Foo.FooCameraModel',PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,LinkedTo=(K2Node_CallFunction_415 F2AB8E6441774533823DD2A413DEF544,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,) CustomProperties Pin (PinId=2B2D8DA343819F2653E8FD8EDB5CCF2E,PinName="K1",PinFriendlyName=NSLOCTEXT("", "51FD07904E508F7CB13C93BD688F8053", "K1"),PinToolTip="K1\nFloat\n\nRadial parameter #1.",PinType.PinCategory="float",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,DefaultValue="0.000000",AutogeneratedDefaultValue="0.000000",LinkedTo=(K2Node_VariableGet_576 A5D1350D4684134EB5EDE0B43F3983D6,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,) CustomProperties Pin (PinId=3704C64244726B58EC95F2A67CFF69A6,PinName="K2",PinFriendlyName=NSLOCTEXT("", "E801FDE14963B939270257AD8B050D63", "K2"),PinToolTip="K2\nFloat\n\nRadial parameter #2.",PinType.PinCategory="float",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,DefaultValue="0.000000",AutogeneratedDefaultValue="0.000000",LinkedTo=(K2Node_VariableGet_577 F9AAFCFC4510CDA989300C82B66FDD0A,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,) CustomProperties Pin (PinId=6BBE5F394D044BCFCB0DE791007C3C29,PinName="K3",PinFriendlyName=NSLOCTEXT("", "23B742A84529B786D655BAA474DF093F", "K3"),PinToolTip="K3\nFloat\n\nRadial parameter #3.",PinType.PinCategory="float",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,DefaultValue="0.000000",AutogeneratedDefaultValue="0.000000",PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=True,bOrphanedPin=False,) CustomProperties Pin (PinId=750F705D4ABB4FEC5A0E2F94FAFC71D2,PinName="P1",PinFriendlyName=NSLOCTEXT("", "12DC4DF74BEABC4D838FC1B6B6AE31D9", "P1"),PinToolTip="P1\nFloat\n\nTangential parameter #1.",PinType.PinCategory="float",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,DefaultValue="0.000000",AutogeneratedDefaultValue="0.000000",PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=True,bOrphanedPin=False,) CustomProperties Pin (PinId=0CC9318C424EDB349C2708B0FC278312,PinName="P2",PinFriendlyName=NSLOCTEXT("", "F697F2D046F8BCE75C362E907893C2CE", "P2"),PinToolTip="P2\nFloat\n\nTangential parameter #2.",PinType.PinCategory="float",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,DefaultValue="0.000000",AutogeneratedDefaultValue="0.000000",PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=True,bOrphanedPin=False,) CustomProperties Pin (PinId=C1ED9647469C1C9EEB589195C808CA4F,PinName="F",PinFriendlyName=NSLOCTEXT("", "87C4A2A842A30F6626475C9B1A20B3C1", "F"),PinToolTip="F\nVector 2D Structure\n\nCamera matrix's Fx and Fy.",PinType.PinCategory="struct",PinType.PinSubCategory="",PinType.PinSubCategoryObject=ScriptStruct'/Script/CoreUObject.Vector2D',PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,DefaultValue="(X=1.000000,Y=1.000000)",AutogeneratedDefaultValue="(X=1.000000,Y=1.000000)",PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=True,bOrphanedPin=False,) CustomProperties Pin (PinId=D3F2C462415328548B3A7DB01661C58B,PinName="C",PinFriendlyName=NSLOCTEXT("", "0D0E5404467E73DD95C63F894611758E", "C"),PinToolTip="C\nVector 2D Structure\n\nCamera matrix's Cx and Cy.",PinType.PinCategory="struct",PinType.PinSubCategory="",PinType.PinSubCategoryObject=ScriptStruct'/Script/CoreUObject.Vector2D',PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,DefaultValue="(X=0.500000,Y=0.500000)",AutogeneratedDefaultValue="(X=0.500000,Y=0.500000)",PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=True,bOrphanedPin=False,) End Object Begin Object Class=/Script/BlueprintGraph.K2Node_VariableGet Name="K2Node_VariableGet_576" VariableReference=(MemberName="K1",MemberGuid=4839CC3849FA034E4200C5930E5527BE,bSelfContext=True) NodePosX=-880 NodePosY=528 NodeGuid=9D923D8B485BDBC67AE6C49857387A19 CustomProperties Pin (PinId=A5D1350D4684134EB5EDE0B43F3983D6,PinName="K1",Direction="EGPD_Output",PinType.PinCategory="float",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,DefaultValue="0.0",AutogeneratedDefaultValue="0.0",LinkedTo=(K2Node_MakeStruct_96 2B2D8DA343819F2653E8FD8EDB5CCF2E,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,) CustomProperties Pin (PinId=855757D34C3ACB48D139749625D425A1,PinName="self",PinFriendlyName=NSLOCTEXT("K2Node", "Target", "Target"),PinType.PinCategory="object",PinType.PinSubCategory="",PinType.PinSubCategoryObject=BlueprintGeneratedClass'/Game/DrawUVDisToRenderTarget.DrawUVDisToRenderTarget_C',PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PersistentGuid=00000000000000000000000000000000,bHidden=True,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,) End Object Begin Object Class=/Script/BlueprintGraph.K2Node_VariableGet Name="K2Node_VariableGet_577" VariableReference=(MemberName="K2",MemberGuid=D895BC2A4F39BE80B8EAD096E8B7700E,bSelfContext=True) NodePosX=-880 NodePosY=576 NodeGuid=EF3CEEFE4A1744607E5ADFAAFC05FD12 CustomProperties Pin (PinId=F9AAFCFC4510CDA989300C82B66FDD0A,PinName="K2",Direction="EGPD_Output",PinType.PinCategory="float",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,DefaultValue="0.0",AutogeneratedDefaultValue="0.0",LinkedTo=(K2Node_MakeStruct_96 3704C64244726B58EC95F2A67CFF69A6,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,) CustomProperties Pin (PinId=21CD4CBD4F198D2481CD28BDE8611989,PinName="self",PinFriendlyName=NSLOCTEXT("K2Node", "Target", "Target"),PinType.PinCategory="object",PinType.PinSubCategory="",PinType.PinSubCategoryObject=BlueprintGeneratedClass'/Game/DrawUVDisToRenderTarget.DrawUVDisToRenderTarget_C',PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PersistentGuid=00000000000000000000000000000000,bHidden=True,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,) End Object Begin Object Class=/Script/BlueprintGraph.K2Node_Event Name="K2Node_Event_192" EventReference=(MemberParent=Class'/Script/Engine.Actor',MemberName="ReceiveTick") bOverrideFunction=True NodePosX=-1024 NodePosY=320 NodeGuid=B7AA8C13412B9A161A352B92CA6A517B CustomProperties Pin (PinId=0946FFD548ACE53983F881B5777ABC2F,PinName="OutputDelegate",Direction="EGPD_Output",PinType.PinCategory="delegate",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(MemberParent=Class'/Script/Engine.Actor',MemberName="ReceiveTick"),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,) CustomProperties Pin (PinId=CF3109B747079A44B53B3DB5B51020FC,PinName="then",Direction="EGPD_Output",PinType.PinCategory="exec",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,LinkedTo=(K2Node_CallFunction_416 79BFE6EF42D85E5A60B44D92A288F50C,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,) CustomProperties Pin (PinId=42C21E7D47A3E8C35F8585A663FFBFB5,PinName="DeltaSeconds",PinToolTip="Delta Seconds\nFloat",Direction="EGPD_Output",PinType.PinCategory="float",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,DefaultValue="0.0",AutogeneratedDefaultValue="0.0",PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,) End Object Begin Object Class=/Script/BlueprintGraph.K2Node_InputKey Name="K2Node_InputKey_192" InputKey=W NodePosX=-976 NodePosY=-161 NodeGuid=4FBA7A1249F1F885C74D75AA91AC55F2 CustomProperties Pin (PinId=0429EAAA4F3A1525226DAE8C05168835,PinName="Pressed",Direction="EGPD_Output",PinType.PinCategory="exec",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,LinkedTo=(K2Node_VariableSet_384 34FD5FE0407CEFD46D3AE59501650E22,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,) CustomProperties Pin (PinId=1AAED7B94E1848D93AC4D1A2C1FF372D,PinName="Released",Direction="EGPD_Output",PinType.PinCategory="exec",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,) CustomProperties Pin (PinId=5E9345974B5A3DDD591CC19CB2AAB597,PinName="Key",Direction="EGPD_Output",PinType.PinCategory="struct",PinType.PinSubCategory="",PinType.PinSubCategoryObject=ScriptStruct'/Script/InputCore.Key',PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,DefaultValue="AnyKey",PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,) End Object Begin Object Class=/Script/BlueprintGraph.K2Node_VariableGet Name="K2Node_VariableGet_578" VariableReference=(MemberName="K1",MemberGuid=4839CC3849FA034E4200C5930E5527BE,bSelfContext=True) NodePosX=-880 NodePosY=-65 NodeGuid=B4638D624BC2F7C9D6FD4588B8F3E398 CustomProperties Pin (PinId=4B8548F545AA42E5DEAA30BB788BDFD5,PinName="K1",Direction="EGPD_Output",PinType.PinCategory="float",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,DefaultValue="0.0",AutogeneratedDefaultValue="0.0",LinkedTo=(K2Node_CommutativeAssociativeBinaryOperator_288 2881016344EEA036B25198B1A2901731,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,) CustomProperties Pin (PinId=ED52FD8B45FABD0DB36912A73E4B4A42,PinName="self",PinFriendlyName=NSLOCTEXT("K2Node", "Target", "Target"),PinType.PinCategory="object",PinType.PinSubCategory="",PinType.PinSubCategoryObject=BlueprintGeneratedClass'/Game/DrawUVDisToRenderTarget.DrawUVDisToRenderTarget_C',PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PersistentGuid=00000000000000000000000000000000,bHidden=True,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,) End Object Begin Object Class=/Script/BlueprintGraph.K2Node_CommutativeAssociativeBinaryOperator Name="K2Node_CommutativeAssociativeBinaryOperator_288" bIsPureFunc=True FunctionReference=(MemberParent=Class'/Script/Engine.KismetMathLibrary',MemberName="Add_FloatFloat") NodePosX=-736 NodePosY=-43 NodeGuid=9C35063A4FDEA57DACE141B8111FD85F CustomProperties Pin (PinId=31DA9D4E432BCD1808FA6E85CB5FAC16,PinName="self",PinFriendlyName=NSLOCTEXT("K2Node", "Target", "Target"),PinType.PinCategory="object",PinType.PinSubCategory="",PinType.PinSubCategoryObject=Class'/Script/Engine.KismetMathLibrary',PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,DefaultObject="/Script/Engine.Default__KismetMathLibrary",PersistentGuid=00000000000000000000000000000000,bHidden=True,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,) CustomProperties Pin (PinId=2881016344EEA036B25198B1A2901731,PinName="A",PinType.PinCategory="float",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,DefaultValue="0.0",AutogeneratedDefaultValue="0.0",LinkedTo=(K2Node_VariableGet_578 4B8548F545AA42E5DEAA30BB788BDFD5,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,) CustomProperties Pin (PinId=0F92D08C4BA9B44D30CBD388DA7B164C,PinName="B",PinType.PinCategory="float",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,DefaultValue="1.000000",AutogeneratedDefaultValue="1.000000",LinkedTo=(K2Node_VariableGet_580 2980C241419284FB7AE273AF1E29C508,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,) CustomProperties Pin (PinId=16B924E244A4C93A9D11E5B6D0644337,PinName="ReturnValue",Direction="EGPD_Output",PinType.PinCategory="float",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,DefaultValue="0.0",AutogeneratedDefaultValue="0.0",LinkedTo=(K2Node_VariableSet_384 5F4C474943E3F540C19AB698F5128FD4,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,) End Object Begin Object Class=/Script/BlueprintGraph.K2Node_VariableSet Name="K2Node_VariableSet_384" VariableReference=(MemberName="K1",MemberGuid=4839CC3849FA034E4200C5930E5527BE,bSelfContext=True) NodePosX=-560 NodePosY=-80 NodeGuid=193B539C4A92386BB27C14ACC1591AFE CustomProperties Pin (PinId=34FD5FE0407CEFD46D3AE59501650E22,PinName="execute",PinType.PinCategory="exec",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,LinkedTo=(K2Node_InputKey_192 0429EAAA4F3A1525226DAE8C05168835,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,) CustomProperties Pin (PinId=4855AEC64D016016F1DBA0B7F06F6E34,PinName="then",Direction="EGPD_Output",PinType.PinCategory="exec",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,) CustomProperties Pin (PinId=5F4C474943E3F540C19AB698F5128FD4,PinName="K1",PinType.PinCategory="float",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,DefaultValue="0.0",AutogeneratedDefaultValue="0.0",LinkedTo=(K2Node_CommutativeAssociativeBinaryOperator_288 16B924E244A4C93A9D11E5B6D0644337,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,) CustomProperties Pin (PinId=B369DA294B0EFE460125B89D37B36016,PinName="Output_Get",PinToolTip="Retrieves the value of the variable, can use instead of a separate Get node",Direction="EGPD_Output",PinType.PinCategory="float",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,DefaultValue="0.0",AutogeneratedDefaultValue="0.0",PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,) CustomProperties Pin (PinId=375B1D804A328D8760AD28AE350A5683,PinName="self",PinFriendlyName=NSLOCTEXT("K2Node", "Target", "Target"),PinType.PinCategory="object",PinType.PinSubCategory="",PinType.PinSubCategoryObject=BlueprintGeneratedClass'/Game/DrawUVDisToRenderTarget.DrawUVDisToRenderTarget_C',PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PersistentGuid=00000000000000000000000000000000,bHidden=True,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,) End Object Begin Object Class=/Script/BlueprintGraph.K2Node_InputKey Name="K2Node_InputKey_193" InputKey=S NodePosX=-976 NodePosY=32 NodeGuid=15E31E514BEC9996A60ABB8835A76ECC CustomProperties Pin (PinId=8E7ECA29433D7EDD8DCDA9AEF8A6CAB3,PinName="Pressed",Direction="EGPD_Output",PinType.PinCategory="exec",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,LinkedTo=(K2Node_VariableSet_385 34FD5FE0407CEFD46D3AE59501650E22,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,) CustomProperties Pin (PinId=68CE8604440CA4A0CEACDFAB4483450D,PinName="Released",Direction="EGPD_Output",PinType.PinCategory="exec",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,) CustomProperties Pin (PinId=811D73054ED84FD4651E0D94C848DB85,PinName="Key",Direction="EGPD_Output",PinType.PinCategory="struct",PinType.PinSubCategory="",PinType.PinSubCategoryObject=ScriptStruct'/Script/InputCore.Key',PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,DefaultValue="AnyKey",PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,) End Object Begin Object Class=/Script/BlueprintGraph.K2Node_VariableGet Name="K2Node_VariableGet_579" VariableReference=(MemberName="K1",MemberGuid=4839CC3849FA034E4200C5930E5527BE,bSelfContext=True) NodePosX=-848 NodePosY=117 NodeGuid=FF6F5BDF4D0BFAF03F5310BAEDD12754 CustomProperties Pin (PinId=4B8548F545AA42E5DEAA30BB788BDFD5,PinName="K1",Direction="EGPD_Output",PinType.PinCategory="float",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,DefaultValue="0.0",AutogeneratedDefaultValue="0.0",LinkedTo=(K2Node_CommutativeAssociativeBinaryOperator_289 2881016344EEA036B25198B1A2901731,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,) CustomProperties Pin (PinId=ED52FD8B45FABD0DB36912A73E4B4A42,PinName="self",PinFriendlyName=NSLOCTEXT("K2Node", "Target", "Target"),PinType.PinCategory="object",PinType.PinSubCategory="",PinType.PinSubCategoryObject=BlueprintGeneratedClass'/Game/DrawUVDisToRenderTarget.DrawUVDisToRenderTarget_C',PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PersistentGuid=00000000000000000000000000000000,bHidden=True,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,) End Object Begin Object Class=/Script/BlueprintGraph.K2Node_CommutativeAssociativeBinaryOperator Name="K2Node_CommutativeAssociativeBinaryOperator_289" bIsPureFunc=True FunctionReference=(MemberParent=Class'/Script/Engine.KismetMathLibrary',MemberName="Add_FloatFloat") NodePosX=-688 NodePosY=133 NodeGuid=B6EF6E4D40028BE66750DFBFC28D5026 CustomProperties Pin (PinId=31DA9D4E432BCD1808FA6E85CB5FAC16,PinName="self",PinFriendlyName=NSLOCTEXT("K2Node", "Target", "Target"),PinToolTip="Target\nKismet Math Library Object Reference",PinType.PinCategory="object",PinType.PinSubCategory="",PinType.PinSubCategoryObject=Class'/Script/Engine.KismetMathLibrary',PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,DefaultObject="/Script/Engine.Default__KismetMathLibrary",PersistentGuid=00000000000000000000000000000000,bHidden=True,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,) CustomProperties Pin (PinId=2881016344EEA036B25198B1A2901731,PinName="A",PinToolTip="A\nFloat",PinType.PinCategory="float",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,DefaultValue="0.0",AutogeneratedDefaultValue="0.0",LinkedTo=(K2Node_VariableGet_579 4B8548F545AA42E5DEAA30BB788BDFD5,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,) CustomProperties Pin (PinId=0F92D08C4BA9B44D30CBD388DA7B164C,PinName="B",PinToolTip="B\nFloat",PinType.PinCategory="float",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,DefaultValue="1.000000",AutogeneratedDefaultValue="1.000000",LinkedTo=(K2Node_CommutativeAssociativeBinaryOperator_290 783E07954DAB142BA4459BA53C394344,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,) CustomProperties Pin (PinId=16B924E244A4C93A9D11E5B6D0644337,PinName="ReturnValue",PinToolTip="Return Value\nFloat",Direction="EGPD_Output",PinType.PinCategory="float",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,DefaultValue="0.0",AutogeneratedDefaultValue="0.0",LinkedTo=(K2Node_VariableSet_385 5F4C474943E3F540C19AB698F5128FD4,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,) End Object Begin Object Class=/Script/BlueprintGraph.K2Node_VariableSet Name="K2Node_VariableSet_385" VariableReference=(MemberName="K1",MemberGuid=4839CC3849FA034E4200C5930E5527BE,bSelfContext=True) NodePosX=-512 NodePosY=96 NodeGuid=2D13E4BF4CB4A7FC1523E1AE69AA90A3 CustomProperties Pin (PinId=34FD5FE0407CEFD46D3AE59501650E22,PinName="execute",PinType.PinCategory="exec",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,LinkedTo=(K2Node_InputKey_193 8E7ECA29433D7EDD8DCDA9AEF8A6CAB3,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,) CustomProperties Pin (PinId=4855AEC64D016016F1DBA0B7F06F6E34,PinName="then",Direction="EGPD_Output",PinType.PinCategory="exec",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,) CustomProperties Pin (PinId=5F4C474943E3F540C19AB698F5128FD4,PinName="K1",PinType.PinCategory="float",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,DefaultValue="0.0",AutogeneratedDefaultValue="0.0",LinkedTo=(K2Node_CommutativeAssociativeBinaryOperator_289 16B924E244A4C93A9D11E5B6D0644337,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,) CustomProperties Pin (PinId=B369DA294B0EFE460125B89D37B36016,PinName="Output_Get",PinToolTip="Retrieves the value of the variable, can use instead of a separate Get node",Direction="EGPD_Output",PinType.PinCategory="float",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,DefaultValue="0.0",AutogeneratedDefaultValue="0.0",PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,) CustomProperties Pin (PinId=375B1D804A328D8760AD28AE350A5683,PinName="self",PinFriendlyName=NSLOCTEXT("K2Node", "Target", "Target"),PinType.PinCategory="object",PinType.PinSubCategory="",PinType.PinSubCategoryObject=BlueprintGeneratedClass'/Game/DrawUVDisToRenderTarget.DrawUVDisToRenderTarget_C',PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PersistentGuid=00000000000000000000000000000000,bHidden=True,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,) End Object Begin Object Class=/Script/BlueprintGraph.K2Node_VariableGet Name="K2Node_VariableGet_580" VariableReference=(MemberName="inc",MemberGuid=4884B3C94FC8DF3C61FE879F885C0513,bSelfContext=True) NodePosX=-880 NodePosY=-1 NodeGuid=04CFCC974D09F5C39905CC92FE6A1713 CustomProperties Pin (PinId=2980C241419284FB7AE273AF1E29C508,PinName="inc",Direction="EGPD_Output",PinType.PinCategory="float",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,DefaultValue="0.0",AutogeneratedDefaultValue="0.0",LinkedTo=(K2Node_CommutativeAssociativeBinaryOperator_288 0F92D08C4BA9B44D30CBD388DA7B164C,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,) CustomProperties Pin (PinId=F03E9DF14235EE0A66DA7A8AE9CCEC0A,PinName="self",PinFriendlyName=NSLOCTEXT("K2Node", "Target", "Target"),PinType.PinCategory="object",PinType.PinSubCategory="",PinType.PinSubCategoryObject=BlueprintGeneratedClass'/Game/DrawUVDisToRenderTarget.DrawUVDisToRenderTarget_C',PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PersistentGuid=00000000000000000000000000000000,bHidden=True,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,) End Object Begin Object Class=/Script/BlueprintGraph.K2Node_VariableGet Name="K2Node_VariableGet_581" VariableReference=(MemberName="inc",MemberGuid=4884B3C94FC8DF3C61FE879F885C0513,bSelfContext=True) NodePosX=-1024 NodePosY=165 NodeGuid=0EB1B27D4A04A1C09B751CA82FBE119E CustomProperties Pin (PinId=3A16050E455FC2A7B8753280F3B3A49F,PinName="inc",Direction="EGPD_Output",PinType.PinCategory="float",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,DefaultValue="0.0",AutogeneratedDefaultValue="0.0",LinkedTo=(K2Node_CommutativeAssociativeBinaryOperator_290 A361B639411834B96FE764A2D4906668,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,) CustomProperties Pin (PinId=B918EB1D428E95863AB5D7B814A3BB9E,PinName="self",PinFriendlyName=NSLOCTEXT("K2Node", "Target", "Target"),PinType.PinCategory="object",PinType.PinSubCategory="",PinType.PinSubCategoryObject=BlueprintGeneratedClass'/Game/DrawUVDisToRenderTarget.DrawUVDisToRenderTarget_C',PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PersistentGuid=00000000000000000000000000000000,bHidden=True,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,) End Object Begin Object Class=/Script/BlueprintGraph.K2Node_CommutativeAssociativeBinaryOperator Name="K2Node_CommutativeAssociativeBinaryOperator_290" bIsPureFunc=True FunctionReference=(MemberParent=Class'/Script/Engine.KismetMathLibrary',MemberName="Multiply_FloatFloat") NodePosX=-848 NodePosY=168 NodeGuid=BDAB4F194B50AE675B4401BB9D6C8C39 CustomProperties Pin (PinId=3FDEE1EC4FC5966307A607902689EAEB,PinName="self",PinFriendlyName=NSLOCTEXT("K2Node", "Target", "Target"),PinType.PinCategory="object",PinType.PinSubCategory="",PinType.PinSubCategoryObject=Class'/Script/Engine.KismetMathLibrary',PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,DefaultObject="/Script/Engine.Default__KismetMathLibrary",PersistentGuid=00000000000000000000000000000000,bHidden=True,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,) CustomProperties Pin (PinId=A361B639411834B96FE764A2D4906668,PinName="A",PinType.PinCategory="float",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,DefaultValue="0.0",AutogeneratedDefaultValue="0.0",LinkedTo=(K2Node_VariableGet_581 3A16050E455FC2A7B8753280F3B3A49F,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,) CustomProperties Pin (PinId=BC525A6F442150954DE5E5BEE36BC24A,PinName="B",PinType.PinCategory="float",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,DefaultValue="-1",AutogeneratedDefaultValue="0.0",PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,) CustomProperties Pin (PinId=783E07954DAB142BA4459BA53C394344,PinName="ReturnValue",Direction="EGPD_Output",PinType.PinCategory="float",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,DefaultValue="0.0",AutogeneratedDefaultValue="0.0",LinkedTo=(K2Node_CommutativeAssociativeBinaryOperator_289 0F92D08C4BA9B44D30CBD388DA7B164C,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,) End Object Begin Object Class=/Script/BlueprintGraph.K2Node_CallFunction Name="K2Node_CallFunction_416" FunctionReference=(MemberParent=Class'/Script/Engine.KismetRenderingLibrary',MemberName="ClearRenderTarget2D") NodePosX=-880 NodePosY=320 NodeGuid=FE0330D94D3366BD6864BDB61EE7936C CustomProperties Pin (PinId=79BFE6EF42D85E5A60B44D92A288F50C,PinName="execute",PinToolTip="\nExec",PinType.PinCategory="exec",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,LinkedTo=(K2Node_Event_192 CF3109B747079A44B53B3DB5B51020FC,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,) CustomProperties Pin (PinId=90ED15F94550FFA4BBC36CA3442B9E34,PinName="then",PinToolTip="\nExec",Direction="EGPD_Output",PinType.PinCategory="exec",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,LinkedTo=(K2Node_CallFunction_415 37A50945406550EE210602B9EDA46A00,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,) CustomProperties Pin (PinId=701455F543533B934DAD6D9724A33137,PinName="self",PinFriendlyName=NSLOCTEXT("K2Node", "Target", "Target"),PinToolTip="Target\nKismet Rendering Library Object Reference",PinType.PinCategory="object",PinType.PinSubCategory="",PinType.PinSubCategoryObject=Class'/Script/Engine.KismetRenderingLibrary',PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,DefaultObject="/Script/Engine.Default__KismetRenderingLibrary",PersistentGuid=00000000000000000000000000000000,bHidden=True,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,) CustomProperties Pin (PinId=0410B7A34146C336929C98820F4C4F9A,PinName="WorldContextObject",PinToolTip="World Context Object\nObject Object Reference",PinType.PinCategory="object",PinType.PinSubCategory="",PinType.PinSubCategoryObject=Class'/Script/CoreUObject.Object',PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PersistentGuid=00000000000000000000000000000000,bHidden=True,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,) CustomProperties Pin (PinId=BC869BDB4035291D58A4F5BCF647E7BC,PinName="TextureRenderTarget",PinToolTip="Texture Render Target\nTexture Render Target 2D Object Reference",PinType.PinCategory="object",PinType.PinSubCategory="",PinType.PinSubCategoryObject=Class'/Script/Engine.TextureRenderTarget2D',PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,DefaultObject="/Game/RT_00.RT_00",PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,) CustomProperties Pin (PinId=B131BC83400BC3963FBF45A829987EA1,PinName="ClearColor",PinToolTip="Clear Color\nLinear Color Structure",PinType.PinCategory="struct",PinType.PinSubCategory="",PinType.PinSubCategoryObject=ScriptStruct'/Script/CoreUObject.LinearColor',PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,DefaultValue="(R=0.000000,G=0.000000,B=0.000000,A=1.000000)",AutogeneratedDefaultValue="(R=0.000000,G=0.000000,B=0.000000,A=1.000000)",PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,) End Object Begin Object Class=/Script/UnrealEd.EdGraphNode_Comment Name="EdGraphNode_Comment_5" NodePosX=-1048 NodePosY=-222 NodeWidth=688 NodeHeight=480 NodeComment="Increase (W) or Decrease (S) the UV Displacement" NodeGuid=F9DBA6D24A88AC009B27B0A979C22582 End Object Begin Object Class=/Script/UnrealEd.EdGraphNode_Comment Name="EdGraphNode_Comment_3" NodePosX=-1056 NodePosY=272 NodeWidth=1088 NodeHeight=400 NodeComment="Make sure to only draw the most current K1 & K2 input values" NodeGuid=8A0F32874A5E6677357A34A938594544 End Object END OBJECT

You can copy and paste this Blueprint code directly into your Blueprint.

Do not forget to input your Render Target into the Output Render Target or you will not see anything happen.

With the required Blueprint logic now setup, make sure to Compile and Save your Blueprint and then drag your Blueprint from the Content Browser into a level. When completed, select the Blueprint and under Input change the Auto Receive Input from Disabled to Player 0.

Click for full image.

Next, select the floor and duplicate it by pressing CTRL + W and then rotate it -90 degrees in the X axis then drag the Material MAT_RT onto it so you can see the effect the of the Draw UVDisplacement to Render Target.

Click for full image.

With everything now setup, press the Play button and then press the W and S keys to warp the Render Target that was input into the Draw UVDisplacement to Render Target node like in the following video.

End Result

At this point you can now distort the content inside a render target from Blueprint to create all kinds of interesting shapes. Next, try and create a new Plugin or edit the existing one and see what kind of interesting images and effects you can create.