The game may not natively support 1080p or 4K. Use tools like the PCGamingWiki guide to manually set custom resolutions in the registry or config files.
There are several high-quality levels named "Triple Trouble" or similar that feature "extra quality" custom visuals and bypass standard frame rate limits. specific content mods singles 2 triple trouble mods extra quality
: Ensure you are running at least Patch 1.4 to resolve core engine bugs before layering on visual mods. The game may not natively support 1080p or 4K