ParamPassMappings
Maps material texture param names to prior passes/elements.
[UPROPERTY](Programming/UnrealArchitecture/Reference/Properties)(EditAnywhere, BlueprintReadOnly, Category="CompositingMaterial", Meta=(ReadOnlyKeys))
TMap< FName, FName > ParamPassMappings
Maps material texture param names to prior passes/elements. Overrides the element's param mapping list above.
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