Wikis / Unreal Wiki / UE3:Set the Material parameter

To set a Material's parameter from UnrealScript you will need either a MaterialInstanceConstant^{(UDK, UT3)} or a MaterialInstanceTimeVarying^{(UDK, UT3)}. If you only have aMaterial^{(UDK, UT3)}, you will need to create a MaterialInstance for that first.

Once you have a MaterialInstance, you can use its Set*() functions to assign a value to any of the material's parameters, for example:

theMaterialInstance.SetTextureParameterValue('aTextureParameter', someTexture);
theMaterialInstance.SetTextureParameterValue('aVectorParameter', FancyLinearColor);
theMaterialInstance.SetTextureParameterValue('aScalarParameter', CoolEffectSpeed);

You can reset all parameters to their defaults by calling the MaterialInstance's ClearParameterValues() function.