Thanks for the suggestion, but that didn't work either. If I remove
steamapps/compatdata/9420, set Steam to use Proton 6.3-5 and try to launch through Steam, it fails:
warning: z:\home\me\games\steamlibrary\steamapps\common\supreme commander forged alliance\gamedata\effects.scd\effects\cartographic.fx: unable to compile effect: z:\home\me\games\steamlibrary\steamapps\common\supreme commander forged alliance\gamedata\effects.scd\effects\cartographic.fx reason: unknown error
Doing the same with Proton 5.13-6 works through Steam, but still won't load, e.g. trying to load a local replay (command copied from Downlord's client):
$ /home/me/games/faf/run-proton-5.13 /home/me/.faforever/bin/ForgedAlliance.exe /init init.lua /nobugreport /log /home/me/.faforever/logs/game_14792563.log /replay /home/me/.faforever/cache/temp.scfareplay /replayid 14792563
wineserver: using server-side synchronization.
Setting breakpad minidump AppID = 9420
Steam_SetMinidumpSteamID: Caching Steam ID: <number> [API loaded no]
Running with Proton 5.0 using this prefix works however. Guess I'll stick with that for now.
The main issue I have is that ACU upgrade effects are not visible; also I think the Cybran ACU gun is less visible than it should be. Small thing.
Oh, I'm using these launch options in Steam; they may be outdated:
PROTON_USE_D9VK=1 DXVK_HUD=full PROTON_NO_ESYNC=1 PROTON_NO_FSYNC=1 PROTON_DUMP_DEBUG_COMMANDS=1 %command%