Vain: Unfortunately, I dont think you can use MMX features in Blitz. Would be nice if it was possible tho
Stonemonkey: I got it working. Thanks. Thats quite cool use of binary operators
So far I'm having no problem with the first version, but my textures don't have a whole lot of red in them. I tried the second version too, which for some reason came out with a blueish tint. It looked kind of cool tho. I think my FPS only went up by 1 or 2, but I guess thats a reasonable increase when I'm getting 10-12 fps in 640*480
TBH the real speed killer is the amount of times my prog is checking points on the rays. If I check them less, theres a whole load more speed, but everything comes out very blocky.