[Soc-2018-dev] Weekly Report #02 - Many Light Sampling

Erik Englesson erikenglesson at gmail.com
Tue May 29 08:20:35 CEST 2018


Hi Stefan,

Good point! The paper doesn't really discuss how the method would work with
multiple importance sampling and I did not think of it. Thanks for bringing
this to my attention!

Best,
Erik

On 27 May 2018 at 09:09, Stefan Werner <stewreo at gmail.com> wrote:

> Hi Erik,
>
> > To the best of my knowledge, the construction and sampling of the light
> BVH are both using top-down algorithms. So hopefully, a bottom-up traversal
> algorithm should not be necessary.
>
> I believe it is necessary for multiple importance sampling. When a BRDF
> ray hits a light source, we need to get the probability of having selected
> that light source via light sampling. You can take a look at Appleseed's
> LightTree::evaluate_node_pdf() for reference.
>
> -Stefan
> --
> Soc-2018-dev mailing list
> Soc-2018-dev at blender.org
> https://lists.blender.org/mailman/listinfo/soc-2018-dev
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.blender.org/pipermail/soc-2018-dev/attachments/20180529/b7db6db7/attachment.html>


More information about the Soc-2018-dev mailing list