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Age	Commit message (Collapse)	Author
2019-12-12	Cycles: perform clamping per light contribution instead of whole path	Lukas Stockner
	With upcoming light group passes, for them to sum up correctly to the combined pass the clamping must be more fine grained. This also has the advantage that if one light is particularly noisy, it does not diminish the contribution from other lights which do not need as much clamping. Clamp values on existing scenes will need to be tweaked to get similar results, there is no automatic conversion possible which would give the same results as before. Implemented by Lukas, with tweaks by Brecht. Part of D4837
2019-04-17	ClangFormat: apply to source, most of intern	Campbell Barton
	Apply clang format as proposed in T53211. For details on usage and instructions for migrating branches without conflicts, see: https://wiki.blender.org/wiki/Tools/ClangFormat
2017-11-09	Cycles: Replace __MAX_CLOSURE__ build option with runtime integrator variable	Mai Lavelle
	Goal is to reduce OpenCL kernel recompilations. Currently viewport renders are still set to use 64 closures as this seems to be faster and we don't want to cause a performance regression there. Needs to be investigated. Reviewed By: brecht Differential Revision: https://developer.blender.org/D2775
2017-11-05	Cycles: reduce closure memory usage for emission/shadow shader data.	Brecht Van Lommel
	With a Titan Xp, reduces path trace local memory from 1092MB to 840MB. Benchmark performance was within 1% with both RX 480 and Titan Xp. Original patch was implemented by Sergey. Differential Revision: https://developer.blender.org/D2249
2017-09-05	Fix T52433: Volume Absorption color tint	Sergey Sharybin
	Need to exit the volume stack when shadow ray laves the medium. Thanks Brecht for review and help in troubleshooting!
2017-09-05	Cycles: Cleanup, style	Sergey Sharybin

2017-08-19	Code cleanup: move rng into path state.	Brecht Van Lommel
	Also pass by value and don't write back now that it is just a hash for seeding and no longer an LCG state. Together this makes CUDA a tiny bit faster in my tests, but mainly simplifies code.
2017-06-10	Cycles: Faster split branched path tracing by sharing samples with inactive ↵	Mai Lavelle
	threads Unlike regular path tracing, branched path tracing is usually used with lower sample counts, at least for primary rays. This means that are less samples for the GPU to work on in parallel and rendering is slower. As there is less work overall there is also more inactive threads during rendering with BPT. This patch makes use of those inactive rays to render branched samples in parallel with other samples. Each thread that is preparing for a branched sample will attempt to find an inactive thread and if one is found the state for the sample is copied to that thread. Potentially, if there are enough inactive threads, 100s of branched samples could be generated from the same originating thread and ran in parallel giving large speed ups. Gives 70% faster render for pavillion midday scene. 20-60% faster on BMW with car paint replaced with SSS/volumes.
2017-05-07	Cycles: Implement denoising option for reducing noise in the rendered image	Lukas Stockner
	This commit contains the first part of the new Cycles denoising option, which filters the resulting image using information gathered during rendering to get rid of noise while preserving visual features as well as possible. To use the option, enable it in the render layer options. The default settings fit a wide range of scenes, but the user can tweak individual settings to control the tradeoff between a noise-free image, image details, and calculation time. Note that the denoiser may still change in the future and that some features are not implemented yet. The most important missing feature is animation denoising, which uses information from multiple frames at once to produce a flicker-free and smoother result. These features will be added in the future. Finally, thanks to all the people who supported this project: - Google (through the GSoC) and Theory Studios for sponsoring the development - The authors of the papers I used for implementing the denoiser (more details on them will be included in the technical docs) - The other Cycles devs for feedback on the code, especially Sergey for mentoring the GSoC project and Brecht for the code review! - And of course the users who helped with testing, reported bugs and things that could and/or should work better!
2017-05-02	Cycles: Branched path tracing for the split kernel	Mai Lavelle
	This implements branched path tracing for the split kernel. General approach is to store the ray state at a branch point, trace the branched ray as normal, then restore the state as necessary before iterating to the next part of the path. A state machine is used to advance the indirect loop state, which avoids the need to add any new kernels. Each iteration the state machine recreates as much state as possible from the stored ray to keep overall storage down. Its kind of hard to keep all the different integration loops in sync, so this needs lots of testing to make sure everything is working correctly. We should probably start trying to deduplicate the integration loops more now. Nonbranched BMW is ~2% slower, while classroom is ~2% faster, other scenes could use more testing still. Reviewers: sergey, nirved Reviewed By: nirved Subscribers: Blendify, bliblubli Differential Revision: https://developer.blender.org/D2611
2017-03-16	Cycles: Avoid some ccl_local in various kernels	Sergey Sharybin

2017-03-13	Cycles: Cleanup, wipe obviously outdated parts of split kernel comments	Sergey Sharybin

2017-03-09	Cycles: split kernel_shadow_blocked to AO & DL parts	Hristo Gueorguiev
	Reduces memory allocation for split kernel. This allows for faster rendering due to bigger global size, specially when GPU memory is limited. Perfromance results: R9 290 total render time Before After Change BMW 4:37 4:34 -1.1 % Classroom 14:43 14:30 -1.5 % Fishy Cat 11:20 11:04 -2.4 % Koro 12:11 12:04 -1.0 % Pabellon Barcelona 22:01 20:44 -5.8 % Pabellon Barcelona() 15:32 15:09 -2.5 % () without glossy connected to volume