Optional compareOptional depthThe GPUStencilOperation performed if the fragment depth comparison described by depthCompare fails.
Optional failThe GPUStencilOperation performed if the fragment stencil comparison test described by compare fails.
Optional passThe GPUStencilOperation performed if the fragment stencil comparison test described by compare passes.
The GPUCompareFunction used when testing fragments against depthStencilAttachment stencil values.