[Bf-cycles] AMD publishes FireRays source code

Stefan Werner swerner at smithmicro.com
Thu May 19 13:52:45 CEST 2016

True, there are references to instancing and motion blur in the “outside” API:

It looks like only object-level transformation blur to me, no vertex level deformations – or am I missing something? Eventually, I’d love to see improved motion blur in Cycles, embree supports it on a BVH level and it’s very fast.


From: <bf-cycles-bounces at blender.org> on behalf of Carlo Andreacchio <carlorules at gmail.com>
Reply-To: Discussion list to assist Cycles render engine developers <bf-cycles at blender.org>
Date: Thursday, May 19, 2016 at 10:07 AM
To: "bf-cycles at blender.org" <bf-cycles at blender.org>
Subject: [Bf-cycles] AMD publishes FireRays source code


From my initial search on the FireRays github, found referencing to instancing code here

and motion blur support here


> Hi,
> I've been checking the sources another day. Was mainly looking into
> traversal parts of the code.
> There's interesting to see stackless traversal implemented, however from a
> quick investigation it only supports AABB nodes (unless i've missed
> something?) and the ray-triangle intersection does not seem to be
> implementing any of robust intersection checks. There is also no instancing
> support.
> I hoped to see some vectorization happening in QBVH traversal, but there's
> no such a thing, all the children are traversed one by one.
> Main advantage f those kernels would be from bucketed ray-to-scene
> intersectons. It might be better performance, but we do something really
> similar in the split kernel (we use stack there tho). Would be interesting
> to see how the FireRays kernels will behave after OBB/MoBlur/Hair support
> added tho.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.blender.org/pipermail/bf-cycles/attachments/20160519/1b703472/attachment.htm 

More information about the Bf-cycles mailing list