Commit Graph

24 Commits

Author SHA1 Message Date
Brecht Van Lommel
4ba456d175 Cycles: first step for implementation of non-progressive sampler that handles
direct and indirect lighting differently. Rather than picking one light for each
point on the path, it now loops over all lights for direct lighting. For indirect
lighting it still picks a random light each time.

It gives control over the number of AA samples, and the number of Diffuse, Glossy,
Transmission, AO, Mesh Light, Background and Lamp samples for each AA sample.

This helps tuning render performance/noise and tends to give less noise for renders
dominated by direct lighting.

This sampling mode only works on the CPU, and still needs proper tile rendering
to show progress (will follow tommorrow or so), because each AA sample can be quite
slow now and so the delay between each update wil be too long.
2012-06-13 11:44:48 +00:00
Thomas Dinges
510f98576a Cycles / OSL:
* Compile fixes, missing ShaderClosure argument for eval functions. (r40163)
2012-06-04 19:53:50 +00:00
Brecht Van Lommel
c3e1fce775 Cycles: add Object Info node, with outputs object location, object/material
pass index, and a random number unique to the instance of the object.

This can be useful to give some variation to a single material assigned to
multiple instances, either manually controlled through the object index, based
on the object location, or randomized for each instance. 

http://wiki.blender.org/index.php/Doc:2.6/Manual/Render/Cycles/Nodes/More#Object_Info
2012-05-21 12:52:28 +00:00
Brecht Van Lommel
f87682f631 Fix #31247: cycles crash after recent bugfix. 2012-05-02 18:14:59 +00:00
Brecht Van Lommel
d64661b507 Cycles: add Ray Length output to Light Path node. This gives the distance 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
2012-05-02 17:03:46 +00:00
Brecht Van Lommel
1e2afcddd3 Fix #31168: cycles mask layer should only affect objects for camera rays.
Fix: texture coordinate normal output was not correct, still changed under
object transform.
2012-05-02 09:33:45 +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
4a427a441b Fix #30049: cycles noise texture producing nan values with some
texture coordinates, due to int overflow.

Also minor tweak in shader code to avoid copying uninitialized
values, should have no effect though because they were not used.
2012-02-07 17:32:01 +00:00
Brecht Van Lommel
21554f2df5 Fix #30011 & #30027: cycles division by zero evaluating BSDF with zero weights,
showed up as NaN on GPU render.
2012-01-31 15:59:30 +00:00
Brecht Van Lommel
4fe00cd4f9 Cycles: disable environment importance sampling code for CUDA cards with
compute model < 2.x, to avoid running out of memory in the compiler.
2012-01-26 19:45:59 +00:00
Brecht Van Lommel
f99343d3b8 Cycles: Render Passes
Currently supported passes:
* Combined, Z, Normal, Object Index, Material Index, Emission, Environment,
  Diffuse/Glossy/Transmission x Direct/Indirect/Color

Not supported yet:
* UV, Vector, Mist

Only enabled for CPU devices at the moment, will do GPU tweaks tommorrow,
also for environment importance sampling.

Documentation:
http://wiki.blender.org/index.php/Doc:2.6/Manual/Render/Cycles/Passes
2012-01-25 17:23:52 +00:00
Brecht Van Lommel
3ce32c3fec Fix small code issue pointed out by nico_ga, was doing negation on unsigned type,
didn't seem to break anything though.
2012-01-18 22:36:12 +00:00
Brecht Van Lommel
47853bf6f6 Cycles: OpenCL tweaks
* Reduce kernel arguments size, helps compile for apple nvidia.
* Fix use of unitialized variable in displace kernel.
* Use build flags in opencl kernel md5 hash.
* Reorganize code for kernel feature #defines a bit.
2011-11-22 13:15:19 +00:00
Brecht Van Lommel
63ff37c6d4 Fix #29278: cycles crash with displacement method both. 2011-11-15 22:09:30 +00:00
Thomas Dinges
60b72a7a41 Cycles:
* World background was emitting light, even after removal of World shader nodes.
2011-10-16 14:11:53 +00:00
Brecht Van Lommel
9ebfcea8f3 Cycles: revert commit that joined surface/volume socket into a single shader socket,
on second thought this makes it a bit too difficult to understand what's going on.
2011-10-12 23:03:12 +00:00
Brecht Van Lommel
7503a7edfb Cycles: replace surface/volume sockets in output nodes with a single shader socket,
decided it's better to render objects as either surface or volume.

This may break the volume rendering patch, but shaders with volume closures still
get tagged as having volume closures, so it should be fixable without too many
changes.
2011-10-12 15:42:35 +00:00
Brecht Van Lommel
cdee3435c6 Cycles: internal changes that should have no effect on user level yet, added
shader flags for various purposes, and some code for light types other than
points.
2011-09-27 20:37:24 +00:00
Brecht Van Lommel
ebc653463d Cycles:
* Fix missing update when editing objects with emission materials.
* Fix preview pass rendering set to 1 not showing full resolution.
* Fix CUDA runtime compiling failing due to missing cache directory.
* Use settings from first render layer for visibility and material override.

And a bunch of incomplete and still disabled code mostly related to closure
sampling.
2011-09-12 13:13:56 +00:00
Brecht Van Lommel
1f7ac51c36 Cycles: fix opencl device bug that crashed on windows. Now shows diffuse
meshes here on windows/nvidia.
2011-09-01 22:40:52 +00:00
Brecht Van Lommel
8ddef5163f Cycles: fix broken kernel compile after recent change, some tweaks
to UI to only show options when available, fix linux lib detection.
2011-09-01 19:43:57 +00:00
Brecht Van Lommel
bae896691a Cycles:
* Add alpha pass output, to use set Transparent option in Film panel.
* Add Holdout closure (OSL terminology), this is like the Sky option in the
  internal renderer, objects with this closure show the background / zero
  alpha.
* Add option to use Gaussian instead of Box pixel filter in the UI.
* Remove camera response curves for now, they don't really belong here in
  the pipeline, should be moved to compositor.

* Output full float values for rendering now, previously was only byte precision.
* Add a patch from Thomas to get a preview passes option, but still disabled
  because it isn't quite working right yet.
* CUDA: don't compile shader graph evaluation inline.
* Convert tabs to spaces in python files.
2011-08-28 13:55:59 +00:00
Brecht Van Lommel
b98ccf6998 Cycles: amd opencl compatibility fixes. 2011-08-10 14:26:51 +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