topic Re: Per-face Geometry/Ray mask in Intel® Embree Ray Tracing Kernels

Per-face Geometry/Ray mask

Sharpe__Brian — Wed, 26 May 2021 00:09:31 GMT

Hi Intel

Currently in our renderer, materials can affect the geometry/ray mask (ie what is set via rtcSetGeometryMask())

I'm working on having per-face materials at the moment, which means that different faces in a mesh can require a different mask. Because the geometry/ray mask can only be set on a mesh as a whole, I'm having to break it up into chunks (with each chunk representing faces that share the same mask), which is adding more complexity to my renderer than I would have liked.

Have you ever considered allowing for a per-face mask?
Do you think there would/could be performance issues?

Thanks!
Brian Sharpe

Re: Per-face Geometry/Ray mask

SvenW_Intel — Fri, 28 May 2021 07:26:16 GMT

I think per primitive masks is a reasonable feature, I added it to our list. With current Embree you do not need to break up your geometry into chunks, you can also implement per-primitive masking using intersection filters. You just make the mask test in the filter and reject the hit if it fails the mask test.

Re: Per-face Geometry/Ray mask

Sharpe__Brian — Wed, 02 Jun 2021 02:21:05 GMT

Ok, I'll try the intersection filter and see which is faster.
Thanks for the info Sven