Jon Parker

I'm trying to extract some AOVs from particles that are partially transparent and constant shaded. For mattes, for example.

Unfortunately it seems that AOVs are multiplied by the opacity no matter what... which seems wrong and difficult to work with, since... they're AOVs and theoretically should be able to do anything.

Maybe I'm getting old but I seem to remember doing this easily enough in Mantra.

So I now want to try the LPE approach and make an AOV for each subset of my particles' shader emission. Ideally a prim for each particle group, and tag them with a LPE tag and make a different render var for each.

Does that work?

If you're intending the boat to become an asset in a larger scene, I recommend setting it up using the Component Builder framework. You can use a pre-existing USD as an input file in the "Component Geometry" node, then in different branches you can activate / deactivate the masts and plug them into component geometry nodes.

If you're new to Solaris but have some Houdini experience I recommend Peter Arcara's tutorials here:
https://www.sidefx.com/tutorials/usd-asset-building-with-solaris/ [www.sidefx.com]

Shouldn't these eventually be visible in SOPs too, since that's a sanctioned way of working with COPs now?