Lukas Stockner 3107d1f962 Cycles: Improve parameter packing for BSDFs and emission
This replaces `stack_assign` with `stack_assign_if_linked`, which should save a few SVM nodes for constant parameters.

Running benchmarks (all scenes in the benchmark repo, 3 runs, median value for each) shows 1.0% improvement on CPU and 1.5% on OptiX. Not huge, but fairly (all between -0.2% and 3.0%).

Pull Request: https://projects.blender.org/blender/blender/pulls/143404
2025-08-04 15:19:40 +02:00
2023-12-08 13:28:13 +11:00
2025-07-10 12:48:33 +10:00

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