[Bf-cycles] old volumetric patch rebased

Brecht Van Lommel brechtvanlommel at pandora.be
Mon Dec 12 22:43:43 CET 2011


Basic volume rendering might be a nice target for the next release, do
you think that is feasible, is this something you want to finish by

One thing I'm not sure about is using the woodcock algorithm. Being
unbiased is nice, but it should come at too high a performance cost, a
basic fixed step size with some randomization to decorrelate the noise
seems to be more common in render engines?


On Mon, Dec 12, 2011 at 4:07 PM, storm <kartochka22 at yandex.ru> wrote:
> Please ignore MTL related property and  kernel_mlt.c, it just joke, i am
> too lazy to comment them out. Patch is snapshot of local current svn.
> Nothing new, literally, except it rebased to latest Blender svn and
> Density input now somewhat work, if Homogeneous check not set, you can
> plug in some 3d procedural texture to play with woodcock algorithm.
> Warning: woodcock constant hard coded to 0.95, so variable density
> greater 0.95 do not work.
> Just to be sure, i repeat: nothing MLT related in this patch, it is my
> own stupid sandbox random lines of code.
> Still waiting for new AMD drivers for linux, maybe after that i can do
> something more useful. Patch work only on CPU if work at all.
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