Any way to disable low persistence?

Although I'm not using unity, so don't know if you can do these things in it, but if saving fps is all your trying to do you should add a monoscopic option or lower resolution camera textures option. I feel keeping low persistence on is very important because without it, it makes me very swimmy in the head in dk2 in seconds. For some reason in dk1 it doesn't bother me so much but dk2 without low persistence, that blur makes it unplayable for me. I also don't have the greatest card (gtx650) and found most of the time i can just reduce the camera texture resolution to keep up frame-rates while testing or use monoscopic depending on what I'm doing. at least those things don't make you feel sick. Just thought worth mentioning other options if the blur makes you sick like it does for me.