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Age	Commit message (Collapse)	Author
2016-12-01	Cycles: Fix correlation issues in certain cases	Sergey Sharybin
	There were two cases where correlation issues were obvious: - File from T38710 was giving issues in 2.78a again - File from T50116 was having totally different shadow between sample 1 and sample 32. Use some more simplified version of CMJ hash which seems to give nice randomized value which solves the correlation. This commit will break all unit test files, but it's a bug fix so perhaps OK to commit this. This also fixes T41143: Sobol gives nonuniform noise Proper science paper about hash function is coming. Reviewers: brecht Reviewed By: brecht Subscribers: lukasstockner97 Differential Revision: https://developer.blender.org/D2385
2016-04-29	Fix T48301: Cycles incorrect render with CMJ and viewport samples 0.	Brecht Van Lommel
	Max samples 2147483647 was causing integer overflow.
2016-02-24	Cycles: Fix bug in CMJ pattern when number of samples is 1	Sergey Sharybin
	It was wrongly considering 1 is a power of 2. While it is a correct thing (1 == 2^0) it's not what the math in some later formulas expects.
2015-11-03	Fix T46671: Cycles assert with CMJ sample function	Sergey Sharybin
	With current formulation of cmj_fast_div_pow2() it should always return 0 in the case of first argument is zero and no assert really needed anymore.
2015-03-27	Cycles: Code cleanup, spaces around keywords	Sergey Sharybin
	This inconsistency drove me totally crazy, it's really confusing when it's inconsistent especially when you work on both Cycles and Blender sides. Shouldn;t cause merge PITA, it's whitespace changes only, Git should be able to merge it nicely.
2015-03-13	Cycles: Optimization for CMJ in CUDA kernels	Sergey Sharybin
	Two things: - Use intrinsics for clz/ctz (ctz is implemented via ffs()). - Use faster sqrt() function which precision is enough for integer values.
2014-12-25	Cleanup: Fix Cycles Apache header.	Thomas Dinges
	This was already mixed a bit, but the dot belongs there.
2014-08-28	Fix T41601: Correlated multi-jitter with high samples "hangs"	Sergey Sharybin
	Issue was caused by the precision issues which made sdivm by 1 under it's actual value. We can try to do some eps magic, but from the tests on laptop and desktop doing integer division is not slower than using floats here.
2014-08-27	Cleanup: intrin.h is already included via util_optimization.h.	Thomas Dinges

2014-08-26	Move include outside of the CCL namespace	Sergey Sharybin

2014-08-26	Cycles: Use compiler intrinsics for clz/ctz in CMJ code for MSVC	Sergey Sharybin

2013-11-18	Cycles: change __device and similar qualifiers to ccl_device in kernel code.	Brecht Van Lommel
	This to avoids build conflicts with libc++ on FreeBSD, these __ prefixed values are reserved for compilers. I apologize to anyone who has patches or branches and has to go through the pain of merging this change, it may be easiest to do these same replacements in your code and then apply/merge the patch. Ref T37477.
2013-08-24	Fix #36545: crash with branched path tracing, correlated multi-jittered	Brecht Van Lommel
	sampling and subsurface scattering.
2013-08-18	Cycles: relicense GNU GPL source code to Apache version 2.0.	Brecht Van Lommel
	More information in this post: http://code.blender.org/ Thanks to all contributes for giving their permission!
2013-06-19	Cycles: prepare to make CUDA 5.0 the official version we use	Brecht Van Lommel
	* Add CUDA compiler version detection to cmake/scons/runtime * Remove noinline in kernel_shader.h and reenable --use_fast_math if CUDA 5.x is used, these were workarounds for CUDA 4.2 bugs * Change max number of registers to 32 for sm 2.x (based on performance tests from Martijn Berger and confirmed here), and also for NVidia OpenCL. Overall it seems that with these changes and the latest CUDA 5.0 download, that performance is as good as or better than the 2.67b release with the scenes and graphics cards I tested.
2013-06-18	Cycles: attempt to fix internal compile error with some visual studio builds	Brecht Van Lommel

2013-06-12	Fix #35665: more CUDA issues with recent kernel changes, tested on sm_20, sm_21	Brecht Van Lommel
	and sm_30 cards, so hopefully it should all work now. Also includes some warnings fixes related to nvcc compiler arguments, should make no difference otherwise.
2013-06-07	Cycles: experimental correlated multi-jittered sampling pattern that can be used	Brecht Van Lommel
	instead of sobol. So far one doesn't seem to be consistently better or worse than the other for the same number of samples but more testing is needed. The random number generator itself is slower than sobol for most number of samples, except 16, 64, 256, .. because they can be computed faster. This can probably be optimized, but we can do that when/if this actually turns out to be useful. Paper this implementation is based on: http://graphics.pixar.com/library/MultiJitteredSampling/ Also includes some refactoring of RNG code, fixing a Sobol correlation issue with the first BSDF and < 16 samples, skipping some unneeded RNG calls and using a simpler unit square to unit disk function.