117bfc870d
While easier to understand, the conventionnal global scene thickness parameter have some downside: - It doesn't scale with larger scenes since the distant samples have small thickness - It doesn't handle fine geometric variation in foreground. The proposed angular thicknes makes all sample have the same angular span. This makes it distance independant and capture different occluder thickness with less artifacts. The downside is that the occluders have the same angular span at any distance which makes the same occluder inflate with distance. A downside is that the geometry near the shading point is under-represented. Leaving light leaking or lack of AO at contact points. To fix this, we introduce back a geometric thickness parameter. Pull Request: https://projects.blender.org/blender/blender/pulls/122334
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