I've always used the multi pass system to boost layers OVER my existing beauty render, obviously not the usual method but I always had issues with multi-pass so decided to throw a scene together and practice with it.
It's relatively simple, and I usually work in linear colour space anyway, however since playing around with compositing by building layers properly, I've noticed there seems to be some trade offs? When I use linear in color profile and tonemapped I seem to loose my zdepth when bringing it in to PS...I've always rendered out linear/tonemapped as the zdepth never works in the linear image color profile...but seeing as I'm attempting to rebuild this properly with layers , tonemapped seems out the question if I want to use a linear add blending mode?
I've attached an image as it seems easier to compare the 2 16bit PSD files I rendered out and the resulting composite using LINEAR DODGE(ADD).
Am I missing something here? I know they are 2 different options but surely zdepth is a multi-pass composite layer it should work with the linear color profile?