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morecycles.blogspot.com

More Cycles: Kickoff

http://morecycles.blogspot.com/2011/12/kickoff.html

Blender Cycles renderer enhancement project. Wednesday, December 28, 2011. For quite some time, but I couldn't pass up the chance to contribute to a software package I admire so much. After quite a bit of discussion. About what features to tackle, and their requests to donate to the cause, I set up a chipin event. For it. No sooner did I do that, I got a handful of donations, so it's definitely game on for me. Subscribe to: Post Comments (Atom). Cycles dev list archives.

morecycles.blogspot.com

More Cycles: HDR texture sampling (pt 1)

http://morecycles.blogspot.com/2012/01/hdr-texture-sampling-pt-1.html

Blender Cycles renderer enhancement project. Wednesday, January 25, 2012. HDR texture sampling (pt 1). One of the things I discovered while working on environment importance sampling is that Cycles encodes all of its textures to 32-bit byte-per-component RGBA format before uploading to the compute device. Essentially, this means all textures are low dynamic range. Low dynamic range (0.0 to 1.0 clamp) - Grace Cathedral light probe. High dynamic range - Grace Cathedral light probe. I have yet to figure out...

morecycles.blogspot.com

More Cycles: HDR Texture Sampling (pt 2)

http://morecycles.blogspot.com/2012/03/hdr-texture-sampling-pt-2.html

Blender Cycles renderer enhancement project. Wednesday, March 7, 2012. HDR Texture Sampling (pt 2). I had proposed a patch for HDR texture sampling a ways back, and Brecht has committed it (with a few small modifications). I feel like there's a texture slot bug lurking in there that I may need to fix, but I'll have to verify that. A couple of things to keep in mind:. Anyone who was using the 100 slots before for non-float textures, though, is in for a surprise; they've lost 5 regular (non-float) texture ...

morecycles.blogspot.com

More Cycles: March 2012

http://morecycles.blogspot.com/2012_03_01_archive.html

Blender Cycles renderer enhancement project. Wednesday, March 21, 2012. Cycles internally has an implementation of the Ward anisotropic BRDF, but it has remained disabled. There weren't consistent tangent directions across polygon face borders, and so the shading would result in a very faceted appearance. Here is a quick test showing the results. The top-left sphere is just diffuse (for reference), and the top-right greenish sphere is the existing glossy specular, which is not anisotropic. The ot...If yo...

morecycles.blogspot.com

More Cycles: Environment Importance Sampling

http://morecycles.blogspot.com/2012/01/environment-importance-sampling.html

Blender Cycles renderer enhancement project. Sunday, January 15, 2012. I submitted a patch for environment importance sampling (and multiple importance sampling too) that should help reduce noise in scenes with any sort of complex environment them. It treats the environment as a light so that it participates in the direct lighting machinery, and it also adds an importance map to know where the bright spots on the image are, and favor those. Before - no environment light. After - with environment light.

morecycles.blogspot.com

More Cycles: January 2012

http://morecycles.blogspot.com/2012_01_01_archive.html

Blender Cycles renderer enhancement project. Wednesday, January 25, 2012. HDR texture sampling (pt 1). One of the things I discovered while working on environment importance sampling is that Cycles encodes all of its textures to 32-bit byte-per-component RGBA format before uploading to the compute device. Essentially, this means all textures are low dynamic range. Low dynamic range (0.0 to 1.0 clamp) - Grace Cathedral light probe. High dynamic range - Grace Cathedral light probe. I have yet to figure out...

morecycles.blogspot.com

More Cycles: Cycles Enhancement Plan

http://morecycles.blogspot.com/p/cycles-enhancement-plan.html

Blender Cycles renderer enhancement project. These are meant to help Farny get familiar with the Cycles codebase, while still having a measurable impact on user productivity. Purpose: noise reduction for outdoor or faraway-lit scenes. Backgrounds as lights: 20 hrs. Pharr/Humphries 1D-2D CDFs as textures, stuffed into the light distribution data: 20 hrs. Purpose: allow full HDR range textures, particularly of use for backgrounds and light gels. Cycles currently restricts textures to 32-bit samples, 8 bits...

morecycles.blogspot.com

More Cycles: December 2011

http://morecycles.blogspot.com/2011_12_01_archive.html

Blender Cycles renderer enhancement project. Wednesday, December 28, 2011. For quite some time, but I couldn't pass up the chance to contribute to a software package I admire so much. After quite a bit of discussion. About what features to tackle, and their requests to donate to the cause, I set up a chipin event. For it. No sooner did I do that, I got a handful of donations, so it's definitely game on for me. Subscribe to: Posts (Atom). Cycles dev list archives. RenderSpud (Farny's personal project).

morecycles.blogspot.com

More Cycles: Anisotropic shading

http://morecycles.blogspot.com/2012/03/anisotropic-shading.html

Blender Cycles renderer enhancement project. Wednesday, March 21, 2012. Cycles internally has an implementation of the Ward anisotropic BRDF, but it has remained disabled. There weren't consistent tangent directions across polygon face borders, and so the shading would result in a very faceted appearance. Here is a quick test showing the results. The top-left sphere is just diffuse (for reference), and the top-right greenish sphere is the existing glossy specular, which is not anisotropic. The ot...If yo...