Commit Graph

15 Commits

Author SHA1 Message Date
Thomas Dinges
49115b4dd3 Cycles:
* Use float_to_int() functions in a few more places.
2013-06-09 15:09:15 +00:00
Brecht Van Lommel
cf0e457e52 Fix #35004: fireflies with .tif image in cycles, try to avoid extreme values when
openimageio can't detect premul/straight alpha correct.
2013-04-17 14:47:58 +00:00
Brecht Van Lommel
3863e72c73 Fix #34679: cycles image texture alpha fringes. New rule is now that color output
will not give straight RGB values if the alpha output is used, so that mixing with
a transparent BSDF gives the correct result.
2013-04-05 16:43:53 +00:00
Sergey Sharybin
540c9d4208 Cycles: fix crash rendering textured objects in OpenCL
Issue was caused by changed order of texture slots -- float textures
have got lower slots indices than byte textures. OpenCL was still assuming
byte textures goes before float.
2012-11-05 08:05:24 +00:00
Brecht Van Lommel
73b79a6763 Cycles OSL: light path, texture coordinate, bump and blended box mapping now up
to date and working.
2012-10-20 15:09:36 +00:00
Brecht Van Lommel
adea12cb01 Cycles: merge of changes from tomato branch.
Regular rendering now works tiled, and supports save buffers to save memory
during render and cache render results.

Brick texture node by Thomas.
http://wiki.blender.org/index.php/Doc:2.6/Manual/Render/Cycles/Nodes/Textures#Brick_Texture

Image texture Blended Box Mapping.
http://wiki.blender.org/index.php/Doc:2.6/Manual/Render/Cycles/Nodes/Textures#Image_Texture
http://mango.blender.org/production/blended_box/

Various bug fixes by Sergey and Campbell.
* Fix for reading freed memory in some node setups.
* Fix incorrect memory read when synchronizing mesh motion.
* Fix crash appearing when direct light usage is different on different layers.
* Fix for vector pass gives wrong result in some circumstances.
* Fix for wrong resolution used for rendering Render Layer node.
* Option to cancel rendering when doing initial synchronization.
* No more texture limit when using CPU render.
* Many fixes for new tiled rendering.
2012-09-04 13:29:07 +00:00
Campbell Barton
0fbb6bff27 style cleanup: block comments 2012-06-09 17:22:52 +00:00
Brecht Van Lommel
dd9c1b7fbf Cycles: OpenCL image texture support, fix an attribute node issue and refactor
feature enabling #defines a bit.
2012-05-13 12:32:44 +00:00
Brecht Van Lommel
9b8dae71a5 Cycles: support for environment texture "Mirror Ball" projection mode, next to
existing "Equirectangular". This projection is useful to create light probes
from a chrome ball placed in a real scene. It expects as input a photograph of
the chrome ball, cropped so the ball just fits inside the image boundaries.

Example setup with panorama camera and mixing two (poor quality) photographs
from different viewpoints to avoid stretching and hide the photographer:
http://www.pasteall.org/pic/28036
2012-03-08 19:52:58 +00:00
Brecht Van Lommel
9fba458a7f Cycles: float texture support. Due to GPU limitations there are now 95 byte,
and 5 float image textures. For CPU render this limit will be lifted later
on with image cache support. Patch by Mike Farnsworth.

Also changed color space option in image/environment texture node, to show
options Color and Non-Color Data, instead of sRGB and Linear, this is more
descriptive, and it was not really correct to equate Non-Color Data with
Linear.
2012-03-07 12:27:18 +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
66b1dfae89 Cycles: tweaks to properties and nodes
* Passes renamed to samples
* Camera lens radius renamed to aperature size/blades/rotation
* Glass and fresnel nodes input is now index of refraction
* Glossy and velvet fresnel socket removed
* Mix/add closure node renamed to mix/add shader node
* Blend weight node added for shader mixing weights

There is some version patching code for reading existing files, but it's not
perfect, so shaders may work a bit different.
2011-09-16 13:14:02 +00:00
Brecht Van Lommel
63d4bafff5 Cycles: some steps to getting OpenCL backend to compile. 2011-05-20 12:26:01 +00:00
Brecht Van Lommel
922bb24865 Cycles: color space control for image/environment texture nodes. Ideally would
be automated but need to think about how to do this, not so simply in a node
system. But guideline for now is, for color textures set to sRGB, for things like
bump or roughness map, set to Linear.
2011-05-13 14:32:08 +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