I have a project where I need to render out a bunch of assets in a studio environment.
I'm using TOPs to load GLTF files, setup render paths and commit the renders.

The problem I encountered is: How do I include the slapcomp into the final output?
I want to avoid (if possible) first rendering out exr files to disk and then running those through a cop network. I would like to apply the slapcomp right when it renders and just output the final composited jpegs.

I have prepared a hip file for this forum where instead of loading GLTFs I just randomly rotate the test pig geometry and give it random colors. The output file name is also a random number. I tried to solve my problem by targeting a rop image output in the slapcomp but that doesn't work.

Here is the video of my setup/problem:

I got the solution from a Think Procedural discrod serverfrom a user "sevenseventrheetwo".

I needed to define the slapcomp inputs and outputs in the "USD Render ROP > Husk > Slap Comp".

In my case I just needed the holdout shadow pass:


Now I just need to figure out the OCIO settings.