[Bf-cycles] Lightprobe importance sampling
Ton Roosendaal
ton at blender.org
Thu Dec 29 18:05:38 CET 2011
Hi Mike,
I'm a bit surprised to read your announcmenet here:
http://morecycles.blogspot.com/
To me it seems more important to first get a good cooperation setup
together. You're more than welcome to help out for Cycles for sure!
For that we should start conversations, here on in IRC, and get good
plans or docs for how to proceed. Doing some small project(s) first to
get to know each other is also a way to move on.
If a situation arises that requires funding, there's also a general
Blender Development Fund we could use.
My own musings about individual fund raisers I wrote down here:
http://code.blender.org/index.php/2011/08/blender-development-fund-fund-raisers/
Thanks,
-Ton-
------------------------------------------------------------------------
Ton Roosendaal Blender Foundation ton at blender.org www.blender.org
Blender Institute Entrepotdok 57A 1018AD Amsterdam The Netherlands
On 28 Dec, 2011, at 8:11, Mike Farnsworth wrote:
> Just a quick heads-up, I'm starting to tinker with cycles, in
> particular I'm trying to add support for Pharr/Humphries style
> importance sampling of environment images. I wanted to make sure I
> had a clear understanding of what I need to change to make it happen.
>
> It appears to me that the path integrator just samples the
> environment on ray misses based on importance sampling the BSDF.
> The only time MIS and light importance sampling come into play are
> when doing direct lighting. The environment doesn't count as a
> 'light' in cycles, thus it never even has a chance to offer
> important directions and a PDF. So, to start, I need to make the
> environment also appear as a light (useful for images and the sky
> background, for example). Once that is done, I can precompute some
> importance information, stuff it in a texture, and go from there?
>
> Let me know if I'm totally barking up the wrong tree.
>
> -Farny
>
> _______________________________________________
> Bf-cycles mailing list
> Bf-cycles at blender.org
> http://lists.blender.org/mailman/listinfo/bf-cycles
More information about the Bf-cycles
mailing list