1. Set your ingame settings to Low, 720p, with a 100% min & max TAA resolution scale, then exit the game.
2. Copy all included files into FINAL FANTASY VII REBIRTH\End\Binaries\Win64 (next to ff7rebirth_.exe).
3. If you're running SteamOS change your game's launch options to: WINEDLLOVERRIDES="dxgi=n,b" %command%
4. Enjoy your game.