https://bugs.winehq.org/show_bug.cgi?id=56639
--- Comment #3 from nolrinale myriabelmonte@gmail.com --- I wanted to share with you the 2 very recent PR's that fixed these issues on DXVK I think you will find greather insights on how it was done over there by checking the commited files.
PR 1: https://github.com/doitsujin/dxvk/pull/4015
PR 2: https://github.com/doitsujin/dxvk/pull/4026
These fixes the entirety of graphics bug left in PSOBB and possibly other D3D8 games like FFXI too