Hello @Crozh, we're using one issue report per unofficially supported game title, so I've gone ahead and transferred this issue report to https://github.com/ValveSoftware/Proton/issues/8495#issuecomment-2800133704.
oh okay, I didn't realize, thanks for letting me know!
proton experimentalx1 2025-04
Compatibility Report
System Information
I confirm:
Symptoms
Camera movement of any kind lowers the framerate with ANY RT config, this doesn't happen with RT off.
I'd like to show you the steam log but launching the game for 1min makes the file 1,2GB in size for some reason and Github won't let me upload that, nor the showcase video. But that one I can manage to share with you on catbox: https://files.catbox.moe/yf8l9p.mp4 (it's not a virus I swear).
I don't know how to compresss the steamlog file.
Reproduction
1)Open GTA V.
2)Enable an RT setting of any kind, AFAIK the every setting has the same issue.
3)Move the camera around, wheter on foot or in a vehicle.
4)Framerate should lower dramaticaly, the speed in which you move the camera matters.