[UPROPERTY](Programming/UnrealArchitecture/Reference/Properties)(EditAnywhere, BlueprintReadWrite, Category="Stencil Clip Layers")
bool bAddDefaultLayer
If true, an additional stencil layer will be rendered which contains all objects which do not belong to layers specified in the Stencil Layers. This is useful for wanting to isolate one or two layers but still have everything else to composite them over without having to remember to add all objects to a default layer.