[SHELVED] Material Layering Feedback for 4.19

Development Asset Creation FX
142

Hi there.
We cannot use PixelNormalWS in Layers or LayerBlends, even though when we do not blend the Normal.
I.e. even if we blend BaseColor Only with PixelNormalWS, it gives us an error that PixelNormalWS is not allowed in the Hull/Domain Shader