Multi-bounce was mainly disabled for disk sampling where the probability of hitting something is relatively low even with high albedo, but this is not so much an issue with random walk. This reduces darkening artifacts at the cost of some extra render time. The difference is mainly visible when using a high radius. Pull Request: https://projects.blender.org/blender/blender/pulls/140665
This folder contains files used by ctest testing system in Blender. The purpose of this files it to do automated render tests for Cycles, Workbench and EEVEE. If you want to extend this collection make sure the file is really small and uses as few samples as possible for reliable detection of render regressions. Each file is expected to be rendered in around one second.