BC Kings square artifacts

I have square artifacts in pc game BC Kings when using reshade. It's dx8 game so it's use dx8 to dx9. I use it to improve game performance.

More information: The game is on Steam, I have no filters on and I tried to turn off Steam overlay. The squares appear always on the same locations on the map. Without Reshade without d3d8to9 there is no square artifacts, but game performance is low. I use most recent Reshade (6.5.1) and d3d8to9 (1.13.0).