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Nicholas Ralabate

Any way to layer with PBR Metallic Reflection or PBR Diffuse on top?

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In Mantra, most of the single-lobe VOPs (PBR Diffuse, PBR Non-metallic Reflection, PBR Metallic Reflection, PBR Emission) have layer inputs/outputs so that they can be chained together with energy conservation.  However, PBR Diffuse and PBR Metallic Reflection only have layer OUTPUTS.  Why is this?  What if I want to put together a shader where those nodes don't come first yet they are still balanced energy-conservation-wise?  I feel like I am missing something simple in terms of layering here.

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use Layer Mix VOP

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well, yeah, it lerps them using the alpha input, the ratios of both BSDFs always add up to 1

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