Hey there,

we've been having a bit of a pickle trying to configure hair and karma.

Our groom artist included uv coordinates which reads as a primvars, intented to be used as uv's for groom. Our texture artist outputed painted masks from Mari and they're needed in lookdev.

What would be the correct procedure to connect the uv coords and use them to drive a materialX image read, same as in other render engines?

Unless we're completely in the wrong, what would be the correct way to drive UV's ( essentially isolating certain follicules ) in the materialx hair shader?

Cheers

Usd primvar reader or MtlX Geometry Property Value.

Set to vector 2 and write the name of your uv attribute.