- I don’t think the PT fully supports substrate materials, so that may be part of your issue.
- If you’re trying to physically simulate something as complicated as this (with what the diagram shows to be at least 4 manifold intersections with differing materials), then an offline DCC line Blender is probably your best shot. Even substrate still cannot handle spectral rendering or true dispersion, so I’d just try making this in a renderer that can.
- If you’re trying to do something like this in a raster way, you’re going to need to be comfortable with hacks. With up to six surfaces to evaluate in a row, this would be an enormous performance tax.
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