Comments (2)
jstone-lucasfilm
commented on June 26, 2024
I'm CC'ing @niklasharrysson and @proog128 for their initial thoughts on this proposal, and members of the OpenPBR team may be interested as well.
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niklasharrysson
commented on June 26, 2024
This sounds good to me. Besides the performance improvement, being able to blend in the thin-film effect feels very useful for artists.
Since this effect is achieved by switching in a different fresnel term, I'm not sure if there are any implementation details to work out? I guess both fresnel terms will need to be calculated to blend between. For path tracers it might complicated importance sampling if the fresnel term is accounted for there. But since this parameterization is part of the OpenPBR specification I'm sure there is a reference implementation one could follow there.
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