Hello,
Have a similar problem where I am moving away from Photoshop for the exact reasons mentioned above. After struggling for many years trying to tame Photoshop and make it play nice with 32bit EXRs, I've given up and moved to Nuke, but for the reasons mentioned above (using brushes and other bitmap edits in my composites without reducing bit depth) I am trying Affinity Photo.
Bringing VRay render elements from Maya to Affinity Photo (AP) I am trying to replicate my existing workflow whereby I multiply raw passes with diffuse then add the stack to go back to beauty, for example:
(RawLight * Diffuse) + (RawGI * DIffuse) should give beauty for a very simple material setup (no reflection, refraction, etc...)
In AP I don't get the desired result, it seems when I use the multiply blend mode on the raw passes the math is not correct.
In the example above when I use Lighting + GI the results are correct.
Any ideas what could be going wrong?
Thanks
Paul
Edit:
The culprit is the RawGI * Diffuse which should equate to GI, in AP it does not.