"Utilities Volume 7 â€“ Render Passes 4 is a set of scripts to create render passes. This set contains the Alpha pass (scene), Alpha pass by figures, Alpha pass by materials. All Utilities Render Passes (and much more) are already included in Advanced Render Settings"
Create and render a separate pass.
The modifications are not destructive: your scene wont be affected.
4 scripts in the ScriptsMenu (Poser 7 and Poser 7 Pro)
4 scripts in the Python palette (Poser 6 and up)