UMaterialInstanceDynamic::InitializeScalarParameterAndGetIndex

Use this function to set an initial value and fetch the index for use in the following function.

Choose your operating system:

Windows

macOS

Linux

References

Module	Engine
Header	/Engine/Source/Runtime/Engine/Classes/Materials/MaterialInstanceDynamic.h
Include	#include "Materials/MaterialInstanceDynamic.h"
Source	/Engine/Source/Runtime/Engine/Private/Materials/MaterialInstanceDynamic.cpp

Syntax

bool InitializeScalarParameterAndGetIndex
(
    const FName & ParameterName,
    float Value,
    int32 & OutParameterIndex
)

Remarks

Generally that's only if you're using an unusually high number of parameters in a material AND setting a huge number of parameters in the same frame.