Isotropix Forums

Hi,
I'm trying to isolate the direct coat pass (Specular2) of the standard material into an AOV using LPEs.
Straight forward expressions in other render packages, like Arnold: C<RS'coat'>L, seem to be pretty tricky in clarisse.
I converted this to C[<RS.'coat'><RG.'coat'>]L|O following the definition from the document:<EventTypeScatteringType'MaterialLabel''LobeLabel'>
Unfortunately this doesn't work. I also tried to index the ScatteringType using S2 and G2 for the second lobe, which didn't work either.

Any help is much appreciated.

Hi,

The correct syntax is like this C<RS.'coat'>.*L|O

Cheers

Hi,

This expression doesn't seem to work and also only filters for pure specular and not glossy. The labels only seem to work only in combination with constants e.g.: C<RG.'coat'>.*<K.'albedo'>

Cheers

After investigation, Clarisse share samples across multiple BSDF. AS a result you can extract only the Constant as you said.

Cheers

As Aymeric mentioned, exporting per lobe light path doesn't work. I think the confusion lies that at some point we internally had enabled this feature and then removed it upon release. It can't work currently since Clarisse is sharing light paths across multiple BSDFs to reduce noise. While this works fine when extracting high level events (RD, RG...) it doesn't when extracting individual lobes since they are mixed with others. Hope I'm making sense.