Poser suppose to do it ? I  have just exported a render as background until now

I didn't know If yes how??

I have Poser pro 2012 and i don't see (for now) how it can product an mutilayers output in PSD format

DazStudio 4 with 3d bridge export directly in Photoshop as layer ,change the scene export another layer on the top ,etc Not multi layers

 Vue d'esprit can export multi files :the render,an alpha version,a deph map