[Bf-cycles] AMD publishes FireRays source code

[Stefan Werner]

True, there are references to instancing and motion blur in the “outside” API:
https://github.com/GPUOpen-LibrariesAndSDKs/FireRays_SDK/blob/d091a737645ef1e16b096024e44323e29b63f9f3/FireRays/include/firerays.h

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.

-Stefan

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

Hi,

From my initial search on the FireRays github, found referencing to instancing code here
https://github.com/GPUOpen-LibrariesAndSDKs/FireRays_SDK/blob/d091a737645ef1e16b096024e44323e29b63f9f3/FireRays/src/primitive/instance.h

and motion blur support here
https://github.com/GPUOpen-LibrariesAndSDKs/FireRays_SDK/blob/d091a737645ef1e16b096024e44323e29b63f9f3/FireRays/src/primitive/shapeimpl.h

Carlo

> 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.
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