I get variable input lag in the mouse, strange screen distortion and framerate drops here and there. It has a really gross jittery look to it. Turning off v-sync tremendously reduces the input lag but it still has awful performance issues. I've tried different resolutions/settings to no avail. My system should also be more than capable of handling it, and I have no problems with EDuke32 or BloodGDX (as well as plenty of modern games, I have a 1060 GTX 6GB).
Any advice would be appreciated, cheers.
