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Unreal Engine C++ API Reference > Runtime > Engine > Materials > UMaterial > PropagateExpressionParameterChanges
References
| Module | Engine |
| Header | /Engine/Source/Runtime/Engine/Classes/Materials/Material.h |
| Include | #include "Materials/Material.h" |
| Source | /Engine/Source/Runtime/Engine/Private/Materials/Material.cpp |
virtual void PropagateExpressionParameterChanges
&40;
const UMaterialExpression &42; Parameter
&41;
Remarks
A parameter with duplicates has to update its peers so that they all have the same value. If this step isn't performed then the expression nodes will not accurately display the final compiled material.
Parameters
| Name | Description |
|---|---|
| Parameter | Pointer to the expression node whose state needs to be propagated. |