Commit Graph

12 Commits

Author SHA1 Message Date
Thomas Dinges
3840e0b234 Cycles / Ray Depth:
* 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.
2013-07-31 20:30:37 +00:00
Brecht Van Lommel
2e3035dd80 Cycles OpenCL: make displacement and world importance sampling work. 2013-06-21 13:05:08 +00:00
Brecht Van Lommel
d835d2f4e6 Code cleanup: avoid some warnings due to implicit uint/int/float/double conversion. 2013-06-07 16:06:17 +00:00
Brecht Van Lommel
838949c3e7 Fix #35207: addition to previous fix to avoid OSL getting uninitialized
ray differentials for lighting, which could cause bad texture filtering
artifacts or performance.
2013-05-03 21:34:51 +00:00
Brecht Van Lommel
5c74e6dae2 Cycles: small code cleanup + fix SSS closure mixed with other closures doing
a bit too much work.
2013-04-02 16:37:28 +00:00
Brecht Van Lommel
06888b7beb Cycles OSL minor optimizations: recycle shading context, don't do memory
allocations for trace data, avoid some virtual function calls. Only helps
a few percentages.
2012-12-15 10:18:42 +00:00
Brecht Van Lommel
6915394a3b Attempts to fix CUDA issues on sm 2.0 cards, still no luck getting motion blur
working, but this should make it not crash.

Also fix for wrong shutter time, should have been shorter.
2012-10-17 22:48:29 +00:00
Lukas Toenne
f3a91f461c Fix for OSL memory leak. The context creation for OSL is now done in the shader_setup_* functions, since it should specific to the sample being worked on. The the context release then happens in the kernel_shader functions after shader evaluation is done. Care has to be taken to ensure the shader_release function is also called in cases where the path integration is cancelled early, this was the main cause for unreleased contexts and subsequent new allocations. 2012-09-05 08:12:22 +00:00
Brecht Van Lommel
4a90339519 Cycles: support for camera rendering an environment map with equirectangular
environment map, by enabling the Panorama option in the camera.

http://wiki.blender.org/index.php/Doc:2.6/Manual/Render/Cycles/Camera#Panorama

The focal length or sensor settings are not used, the UI can be tweaked still to
communicate this, also panorama should probably become a proper camera type like
perspective or ortho.
2012-02-28 16:44:54 +00:00
Brecht Van Lommel
5873301257 Sample as Lamp option for world shaders, to enable multiple importance sampling.
By default lighting from the world is computed solely with indirect light
sampling. However for more complex environment maps this can be too noisy, as
sampling the BSDF may not easily find the highlights in the environment map
image. By enabling this option, the world background will be sampled as a lamp,
with lighter parts automatically given more samples.

Map Resolution specifies the size of the importance map (res x res). Before
rendering starts, an importance map is generated by "baking" a grayscale image
from the world shader. This will then be used to determine which parts of the
background are light and so should receive more samples than darker parts.
Higher resolutions will result in more accurate sampling but take more setup
time and memory.

Patch by Mike Farnsworth, thanks!
2012-01-20 17:49:17 +00:00
Brecht Van Lommel
b5595298d3 Cycles code refactoring: change displace kernel into more generic shader
evaluate kernel, added background shader evaluate.
2011-12-31 15:18:13 +00:00
Ton Roosendaal
da376e0237 Cycles render engine, initial commit. This is the engine itself, blender 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
2011-04-27 11:58:34 +00:00