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Cycles: Update Glass BSDF to generalized_schlick #112701

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Brecht Van Lommel merged 5 commits from Alaska/blender:update-glass-bsdf into blender-v4.0-release 2023-10-09 19:17:24 +02:00
Conversation 2 Commits 5 Files Changed 5 +33 -35
Alaska commented 2023-09-22 06:51:22 +02:00
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Update the Glass BSDF to internally use Generalized Schlick fresnel.
This allows for easier expansion of certain features in the future.

There should be no functional change from the users perspective.

Update the Glass BSDF to internally use Generalized Schlick fresnel. This allows for easier expansion of certain features in the future. There should be no functional change from the users perspective.
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Alaska requested review from Brecht Van Lommel 2023-09-22 06:59:46 +02:00
Alaska requested review from Lukas Stockner 2023-09-22 06:59:54 +02:00
Alaska requested review from Weizhen Huang 2023-09-22 07:00:03 +02:00
Alaska requested review from Clément Foucault 2023-09-22 07:00:10 +02:00
Alaska commented 2023-09-22 07:09:12 +02:00
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There's still questions that need to be answered for this.

  • Do we actually want this change?
  • Should the Glass BSDF get reflection tinting like #112192 ? If we add support for this, then versioning could be used to ensure minimal visual impact for older files.
There's still questions that need to be answered for this. - Do we actually want this change? - ~~Should the Glass BSDF get reflection tinting like #112192 ? If we add support for this, then versioning could be used to ensure minimal visual impact for older files.~~
Clément Foucault requested changes 2023-09-22 11:36:26 +02:00
source/blender/gpu/shaders/material/gpu_shader_material_glass.glsl Outdated
@ -19,3 +19,2 @@
ClosureReflection reflection_data;
reflection_data.weight = bsdf.x * weight;
reflection_data.color = color.rgb;
reflection_data.weight = weight;
Clément Foucault commented 2023-09-22 11:36:23 +02:00
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Why change the weight here? It's used to efficiently sample the more representative closure. It doesn't change the look.

Why change the weight here? It's used to efficiently sample the more representative closure. It doesn't change the look.
Alaska commented 2023-09-22 14:11:44 +02:00
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Why change the weight here?

Mostly inexperience. I was copying something from the Principled BSDF shader without considering it in the context of a large shader like the Principled BSDF and how it might differ from a smaller shader like the glass.

> Why change the weight here? Mostly inexperience. I was copying something from the Principled BSDF shader without considering it in the context of a large shader like the Principled BSDF and how it might differ from a smaller shader like the glass.
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Brecht Van Lommel requested changes 2023-10-06 19:04:59 +02:00
Brecht Van Lommel left a comment
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I was expecting this to just change the Cycles implementation to use the same closures to clean up the code, not to actually change the reflection tint to white.

I would not break compatibility, instead in the future we can change BSDF nodes like these to exposure more inputs that give the additional control.

I was expecting this to just change the Cycles implementation to use the same closures to clean up the code, not to actually change the reflection tint to white. I would not break compatibility, instead in the future we can change BSDF nodes like these to exposure more inputs that give the additional control.
Alaska changed title from Cycles/EEVEE: Update Glass BSDF to match Principled BSDF to WIP: Cycles: Update Glass BSDF to generalized_schlick 2023-10-07 13:10:07 +02:00
Alaska force-pushed update-glass-bsdf from d164c954c4 to 2ee22a0c7e 2023-10-07 13:55:27 +02:00 Compare
Alaska changed title from WIP: Cycles: Update Glass BSDF to generalized_schlick to Cycles: Update Glass BSDF to generalized_schlick 2023-10-07 13:56:54 +02:00
Alaska requested review from Brecht Van Lommel 2023-10-07 13:57:24 +02:00
Brecht Van Lommel approved these changes 2023-10-09 16:49:06 +02:00
Brecht Van Lommel commented 2023-10-09 16:49:20 +02:00
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@blender-bot build

@blender-bot build
Brecht Van Lommel changed title from Cycles: Update Glass BSDF to generalized_schlick to Cycles: Update Glass BSDF to generalized_schlick 2023-10-09 16:49:35 +02:00
brecht changed target branch from main to blender-v4.0-release 2023-10-09 16:49:37 +02:00
Brecht Van Lommel merged commit 85c4df2c42 into blender-v4.0-release 2023-10-09 19:17:24 +02:00
Brecht Van Lommel deleted branch update-glass-bsdf 2023-10-09 19:17:26 +02:00
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