Ah, you mean to use difference to fix composition?
I know how to extract difference in photoshop but I have now clue what operation to use to achieve inverse effect - opposite of difference.
Trying right now
Here is my PSD file
I’ve tried that approach that you’ve described, with no positive result.
I am wandering if maybe there is some element missing or maybe I am adjusting reflection layer in wrong way - it appears most wrong.
I am using linear dodge instead of screen blending - It give me better results.
Never screen! Ever! That will never reproduce the beauty render. Only add or multiply can be used and you have to be working with all floating point buffers. Any buffers you multiply will have issues. The only way to correct them is to create your own raw buffers by dividing your gi by diffuse to create your own raw gi buffer for example.
linear dodge = add in photoshop.
I have other PSD file with imported exr files - the same result.
I’ll check tomorrow if all files have proper export settings.