UMaterialExpressionFresnel | Unreal Engine 5.7 Documentation

Allows the artists to quickly set up a Fresnel term. Returns: pow(1 - max(Normal dot Camera,0),Exponent)


Name	UMaterialExpressionFresnel
Type	class
Header File	/Engine/Source/Runtime/Engine/Public/Materials/MaterialExpressionFresnel.h
Include Path	#include "Materials/MaterialExpressionFresnel.h"

Syntax

UCLASS (MinimalAPI, CollapseCategories, HideCategories=Object)  
class UMaterialExpressionFresnel : public UMaterialExpression

Name	Type	Remarks	Include Path	Unreal Specifiers
BaseReflectFraction	float	Specifies the fraction of specular reflection when the surfaces is viewed from straight on.	Materials/MaterialExpressionFresnel.h	EditAnywhere Category=MaterialExpressionFresnel Meta=(OverridingInputProperty="BaseReflectFractionIn")
BaseReflectFractionIn	FExpressionInput		Materials/MaterialExpressionFresnel.h	Meta=(RequiredInput="false", ToolTip="Defaults to 'BaseReflectFraction' if not specified")
Exponent	float	The exponent to pass into the pow() function	Materials/MaterialExpressionFresnel.h	EditAnywhere Category=MaterialExpressionFresnel Meta=(OverridingInputProperty="ExponentIn")
ExponentIn	FExpressionInput		Materials/MaterialExpressionFresnel.h	Meta=(RequiredInput="false", ToolTip="Defaults to 'Exponent' if not specified")
Normal	FExpressionInput	The normal to dot with the camera FVector	Materials/MaterialExpressionFresnel.h	Meta=(RequiredInput="false", ToolTip="Defaults to Pixel World Normal if not specified")

Name	Remarks	Include Path
virtual void Build ( MIR::FEmitter& Emitter )	Builds this expression's material IR.	Materials/MaterialExpressionFresnel.h
virtual int32 Compile ( FMaterialCompiler* Compiler, int32 OutputIndex )	Create the new shader code chunk needed for the Abs expression	Materials/MaterialExpressionFresnel.h
virtual void GetCaption ( TArray< FString >& OutCaptions ) const	Returns the text to display on the material expression (in the material editor).	Materials/MaterialExpressionFresnel.h