blender/tests/files/render/displacement/cycles_renders/bump_glass.png
Brecht Van Lommel 54f543e4c4 Fix #161234: Cycles caustics blurred out after ray differential widening
The ray differential widening for the texture cache blurred out caustics
both from procedural textures and image textures. The widening helps
reduce texture cache memory, but is also fundamentally biased.

The solution now is to tie this to the Filter Glossy setting that must
already be lowered from the default to make caustics work. When left at
the default the texture cache will be most efficient, when set to small
value or zero there will be little or no widening.

So this setting now becomes a more general bias control for shading
after a rough glossy or diffuse bounce, and the tooltip was updated.

Pull Request: https://projects.blender.org/blender/blender/pulls/162153
2026-08-05 21:34:23 +02:00

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