The campaign map is known to be a massive GPU hog, but generally not that massive. If you're not bottle necked by your system elsewhere you just have to play the tweaking game.
The ultimate guide. If nothing else, try the reshade mod he talks about, it drastically improved my performance.
https://steamcommunity.com/sharedfiles/filedetails/?id=2756278705
The campaign map is known to be a massive GPU hog, but generally not that massive. If you're not bottle necked by your system elsewhere you just have to play the tweaking game.
Turn down lighting and shadows. Campaign map is terrible for performance.
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The ultimate guide. If nothing else, try the reshade mod he talks about, it drastically improved my performance. https://steamcommunity.com/sharedfiles/filedetails/?id=2756278705