EClark1894 posted at 11:58AM Wed, 05 May 2021 - #4418468

There is no one kind of glass. Most people assume that glass is glass and they use the shader thinking it will treat it as such. But remember, Cycles and Superfly are PBR renderers, so there are some lighting and opacity issues that you will have to account for in your settings. That's not as difficult as you think, you have to do the same thing for Firefly, but it's more a matter of what you expect. Think of it like this: looking through a window is not the same as looking through a glass bottle or even eyeglasses. But you expect less or no distortion looking through a window, unless you're looking through it at a weird angle, while you do expect distorions looking through an eyeglass, bottle or even water. Yet people can, will, and have used the Cycles shader to be all of these in a render.

Off hand, except for the color ramp node which I mentioned earlier, I can't be specific on which nodes are missing in Superfly. I do know that a couple of missing nodes are math nodes, I believe, and I think an input and a color node are missing as well.

This is a test from Vray with very thickness of glass, some ridiculous :D But it behaves as I would expect, meaning it doesn't cast a shadow.

I looked up some Blender cycle tutorial and it seems like they have a new shader "PrincipledBsdf", not sure how new it is :D. which someone used earlier here in the chat, but that seem to be able to make clear glass, so it might simply be an issue with the GlassBsdf not sure.