I also noticed the same thing, especially when i play Rage Racer, the background "shaking" like water.This problem has become not so noticable after pete fixed his opengl driver in v1.5.3 .But, the unwanted " water" effects are still there.
VGS used DirectDraw filtering, (support for) which actually depends on the videocard. On my GeForce 2 (and also on my previous TNT2) there's hardware filtering for DirectDraw games and emulators (like FinalBurn, Nebula). I think all nVidia cards have DD filtering, other videocards may or may not(I know the Voodoo 3 doesn't). VGS filtered the entire output display, not the textures themselves so there was no tiled effect. Of course the polygons were also filtered but they still look pretty shitty, especially with only 8-bit color, but 2D games look pretty good.Originally posted by gerbilcannon
This is because they can't interpolate the motion as there is no z-buffer in a psx. Or some explanation along those lines. And you're stuck with the tiled effect sorry. And vgs didn't do any filtering whatsoever.