i turned off spec maps and it fixed some but its still happening in some parts of the map, its not unbearable but quite annoying

Is it just a setting on the map?

Well i know my parts are fine because this is the only game it happens on but i have
i5 intel processor
Nvidia gtx 660
Fatality 550w PSU
8 gb ram

Hello, i play a vast majority of maps from on here and some i experience major artifacting and idk how to fix it so I dont experience it. Is there anyone on here that may have a solution to this?

Note: im not a modder i just play the maps. Any help would be awesome please and thank you