Dan Lee

Oh dear, this looks like a bug - Do you see this with the recent daily (or production) build? There were a couple bucketing bugs in 20.5 which were fixed since release. If so, can you please submit a bug with reproducible scene so that we may investigate this ASAP? Thank you.

Hi. Roughness map does not (or should not) affect albedo of a given BSDF so it can't be used for that - for that you still have to use a shader export (via Karma AOV VOP).
The built-in albedo AOV outputs total/combined albedo and there were a number of users asking for a way to filter out glossy/specular component as they were only interested in diffuse. This new feature allows for precisely that. For example for diffuse reflection+transmission albedo, you can use the following expression: 'CDA'

Hi, can you please file a bug with an example file? Thank you.