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Age	Commit message (Collapse)	Author
2017-03-08	Cycles: Remove ccl_fetch and SOA	Mai Lavelle

2017-01-19	Cycles: Expose diffuse and glossy depth to Light Path node	Sergey Sharybin
	Was a bit confusing to have transparent and translucent depth exposed but no diffuse or glossy. Reviewers: brecht Subscribers: eyecandy Differential Revision: https://developer.blender.org/D2399
2016-02-18	Fix T47461: Different results on CPU and GPU when using Branched Path Tracing	Lukas Stockner
	The issue here was actually somewhere else - the attached scene from the report used a light falloff node in a sunlamp (aka distant light). However, since distant lamps set the ray length to FLT_MAX and the light falloff node squares this value, it overflows and produces a NaN weight, which propagates and leads to a NaN intensity, which is then clamped to zero and produces the black pixels. To fix that issue, the smoothing part of the light falloff is just ignored if the smoothing term isn't finite (which makes sense since the term should converge to 1 as the distance increases). The reason for the different results on CPUs and GPUs is not perfectly clear, but probably can be explained with different handling of Inf/NaN edge cases. Also, to notice issues like these faster in the future, kernel_asserts were added that evaluate as false as soon as a non-finite intensity is produced.
2016-01-07	Cycles: Refactor how we pass bounce info to light path node.	Thomas Dinges
	This commit changes the way how we pass bounce information to the Light Path node. Instead of manualy copying the bounces into ShaderData, we now directly pass PathState. This reduces the arguments that we need to pass around and also makes it easier to extend the feature. This commit also exposes the Transmission Bounce Depth to the Light Path node. It works similar to the Transparent Depth Output: Replace a Transmission lightpath after X bounces with another shader, e.g a Diffuse one. This can be used to avoid black surfaces, due to low amount of max bounces. Reviewed by Sergey and Brecht, thanks for some hlp with this. I tested compilation and usage on CPU (SVM and OSL), CUDA, OpenCL Split and Mega kernel. Hopefully this covers all devices. :)
2015-05-09	Cycles: OpenCL kernel split	George Kyriazis
	This commit contains all the work related on the AMD megakernel split work which was mainly done by Varun Sundar, George Kyriazis and Lenny Wang, plus some help from Sergey Sharybin, Martijn Berger, Thomas Dinges and likely someone else which we're forgetting to mention. Currently only AMD cards are enabled for the new split kernel, but it is possible to force split opencl kernel to be used by setting the following environment variable: CYCLES_OPENCL_SPLIT_KERNEL_TEST=1. Not all the features are supported yet, and that being said no motion blur, camera blur, SSS and volumetrics for now. Also transparent shadows are disabled on AMD device because of some compiler bug. This kernel is also only implements regular path tracing and supporting branched one will take a bit. Branched path tracing is exposed to the interface still, which is a bit misleading and will be hidden there soon. More feature will be enabled once they're ported to the split kernel and tested. Neither regular CPU nor CUDA has any difference, they're generating the same exact code, which means no regressions/improvements there. Based on the research paper: https://research.nvidia.com/sites/default/files/publications/laine2013hpg_paper.pdf Here's the documentation: https://docs.google.com/document/d/1LuXW-CV-sVJkQaEGZlMJ86jZ8FmoPfecaMdR-oiWbUY/edit Design discussion of the patch: https://developer.blender.org/T44197 Differential Revision: https://developer.blender.org/D1200
2015-03-31	Cycles: Avoid float/int conversion in few places	Sergey Sharybin

2014-12-25	Cleanup: Fix Cycles Apache header.	Thomas Dinges
	This was already mixed a bit, but the dot belongs there.
2014-04-21	Cycles: add Transparent Depth output to Light Path node.	Carlo Andreacchio
	This can for example be useful if you want to manually terminate the path at some point and use a color other than black. Reviewed By: brecht Differential Revision: https://developer.blender.org/D454
2013-12-28	Cycles Volume Render: work on nodes and closures.	Brecht Van Lommel
	* Henyey-Greenstein scattering closure implementation. * Rename transparent to absorption node and isotropic to scatter node. * Volume density is folded into the closure weights. * OSL support for volume closures and nodes. * This commit has no user visible changes, there is no volume render code yet. This is work by "storm", Stuart Broadfoot, Thomas Dinges and myself.
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.
2013-08-18	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!
2013-08-01	Cycles / Ray Depth:	Thomas Dinges
	* Added a Ray Depth output to the Light Path node, which gives the user access to the current bounce. This can be used to limit the maximum ray bounce on a per shader basis. Another use case is to restrict light influence with this, to have a lamp only contribute to the direct lighting. http://wiki.blender.org/index.php/Doc:2.6/Manual/Render/Cycles/Nodes/More#Light_Path This is part of my GSoC 2013 project. SVN merge of r58091 and r58772 from soc-2013-dingto.
2012-05-08	Cycles: add light falloff node, with quadratic/linear/constant falloff and a	Brecht Van Lommel
	smoothing factor to reduce high values near the light. http://wiki.blender.org/index.php/Doc:2.6/Manual/Render/Cycles/Nodes/More#Light_Falloff Note that this was already possible to do manually with the Ray Length, but this adds a convenient node for it. This commit also makes the mapping node min/max option work, fixing #31348.
2012-05-02	Cycles: add Ray Length output to Light Path node. This gives the distance ↵	Brecht Van Lommel
	travelled by the last light ray. One use case for this might be to do absorption. Patch #31232 by Agustin benavidez, see this blog post for details: http://agus3d.blogspot.com.ar/2012/05/blender-cycles-ray-length-node-output.html
2011-09-01	Cycles:	Brecht Van Lommel
	* Add max diffuse/glossy/transmission bounces * Add separate min/max for transparent depth * Updated/added some presets that use these options * Add ray visibility options for objects, to hide them from camera/diffuse/glossy/transmission/shadow rays * Is singular ray output for light path node Details here: http://wiki.blender.org/index.php/Dev:2.5/Source/Render/Cycles/LightPaths
2011-08-09	Cycles: opencl 1.1 compatibility tweaks.	Brecht Van Lommel

2011-04-27	Cycles render engine, initial commit. This is the engine itself, blender ↵	Ton Roosendaal
	modifications and build instructions will follow later. Cycles uses code from some great open source projects, many thanks them: * BVH building and traversal code from NVidia's "Understanding the Efficiency of Ray Traversal on GPUs": http://code.google.com/p/understanding-the-efficiency-of-ray-traversal-on-gpus/ * Open Shading Language for a large part of the shading system: http://code.google.com/p/openshadinglanguage/ * Blender for procedural textures and a few other nodes. * Approximate Catmull Clark subdivision from NVidia Mesh tools: http://code.google.com/p/nvidia-mesh-tools/ * Sobol direction vectors from: http://web.maths.unsw.edu.au/~fkuo/sobol/ * Film response functions from: http://www.cs.columbia.edu/CAVE/software/softlib/dorf.php