Brecht Van Lommel
27d647dcf8
Cycles: 4 new nodes.
...
* Tangent: generate a tangent direction for anisotropic shading. Can be either
radial around X/Y/Z axis, or from a UV map. The default tangent for the
anisotropic BSDF and geometry node is now always radial Z, for UV tangent use
this node now.
http://wiki.blender.org/index.php/Doc:2.6/Manual/Render/Cycles/Nodes/More#Tangent
* Normal Map: generate a perturbed normal from an RGB normal map image. This
is usually chained with an Image Texture node in the color input, to specify
the normal map image. For tangent space normal maps, the UV coordinates for
the image must match, and the image texture should be set to Non-Color mode
to give correct results.
http://wiki.blender.org/index.php/Doc:2.6/Manual/Render/Cycles/Nodes/More#Normal_Map
* Refraction BSDF: for best results this node should be considered as a building
block and not be used on its own, but rather mixed with a glossy node using a
fresnel type factor. Otherwise it will give quite dark results at the edges for
glossy refraction.
http://wiki.blender.org/index.php/Doc:2.6/Manual/Render/Cycles/Nodes/Shaders#Refraction
* Ambient Occlusion: controls the amount of AO a surface receives, rather than
having just a global factor in the world. Note that this outputs a shader and
not a color, that's for another time.
http://wiki.blender.org/index.php/Doc:2.6/Manual/Render/Cycles/Nodes/Shaders#Ambient_Occlusion
2012-11-06 19:59:02 +00:00
Brecht Van Lommel
9db3f2368c
Cycles: use mikktspace now for computing tangents from UV maps. This avoids ugly
...
averaged tangents at UV seams but instead now the seams will show as discontinuities
in the tangent.
2012-11-03 15:36:02 +00:00
Brecht Van Lommel
f0a9b66469
Cycles: Anisotropic BSDF enabled, with tangents now computed from the active UV map.
...
It's using the Ward BSDF currently, which has some energy loss so might be a bit
dark. More/better BSDF options can be implemented later.
Patch by Mike Farnsworth, some modifications by me. Currently it's not possible yet
to set a custom tangent, that will follow as part of per-bsdf normals patch.
2012-10-10 13:02:20 +00:00
Lukas Toenne
674d295df3
Fix for attribute lookup in OSL. This uses a map in the OSL globals instead of the device texture.
2012-09-05 17:08:56 +00:00
Lukas Toenne
a823207d81
Cycles fix: particle standard attribute had no name conversion yet.
2012-09-05 12:06:44 +00:00
Campbell Barton
2c1abe1f58
style cleanup: assignment & indentation.
2012-06-09 18:56:12 +00:00
Brecht Van Lommel
1d8c798188
Cycles: support for motion vector and UV passes.
...
Most of the changes are related to adding support for motion data throughout
the code. There's some code for actual camera/object motion blur raytracing
but it's unfinished (it badly slows down the raytracing kernel even when the
option is turned off), so that code it disabled still.
Motion vector export from Blender tries to avoid computing derived meshes
when the mesh does not have a deforming modifier, and it also won't store
motion vectors for every vertex if only the object or camera is moving.
2012-04-30 12:49:26 +00:00
Brecht Van Lommel
6cb896ff0a
Cycles: fix msvc compile warning, patch by Jason Wilkins.
2012-02-28 16:45:01 +00:00
Brecht Van Lommel
64c2d5e90e
Cycles: more opencl fixes.
2011-05-31 11:31:00 +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
