Cc @ishitatsuyuki
FYI, if you want to reproduce in-game, it's easy: just need to play a bit until you reach that giant boat and then at some point you can select your equipment and you should see the pinky rendering.
I own this game. I'll take a look at this.
I debugged this but I haven't made much progress. What I know so far:
proton 7.0-3x1 2022-06proton experimentalx1 2022-06RADV_DEBUG=llvm).x1 2022-06
Original bug report can be found here https://github.com/ValveSoftware/Proton/issues/175#issuecomment-1166584162
The issue doesn't appear with DX11 or with Low/Mid presets in DX12.
The issue doesn't appear with Proton 7.0-3 but happens with Proton Experimental 7.0-20220621.
The issue can be reproduced with RADV, checked Mesa 22.0.0, 22.1.0 and main (including RADV_DEBUG=llvm). The issue also happens with latest AMDVLK, as mentioned in the original bug report.
Attached renderdoc capture with RADV (Mesa main and Proton Experimental 7.0-20220621).
https://people.freedesktop.org/~hakzsam/mhw_pink.rdc