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?