Matt Tillman

Thanks so much!
Glad to be able to help out the community

No worries, I'll look at logging them tomorrow.
I think I submitted an RFE last year but can't remember exactly what I put in it now haha.
I at least remember suggesting implementing similar logic to the render settings parameter (and husk flag) for the render pass equivalents. Which would allow for specifying multiple render passes either explicitly or using pattern matching.

I just uploaded a video covering USD Render Prims.
It was made last year to help explain how to use the new Render Pass prim but took me ages to find the time to finish it up.
Hope it helps someone out there!

As @robp_sidefx mentioned; the matte collection works on geometry prims only. So you need to set the expansion rule to "expand primitives" to correctly apply matting to prims under the specified parent prim.

There are some other tricky things too, like with the prune collection you can't exclude a child from a specified parent like you can with the prune LOP.

I have a tutorial covering it in depth but haven't had the time to finish editing it. Hopefully I'll get it out soon.