Does anybody have an idea on how I can blend from one texture to another accross the face of a polygon-quickly (i.e. so I could, for example, fade from texture A at the left edge of the polygon to another texture B at the right side of the polygon). I know I can do it in two passes using blending and alpha channels, but I would like to do it in one pass - I just can’t coax ARB Multitexturing into doing it automatically. Maybe it just can’t be done which would be unfortunate for me.
Any enlightenment is appreciated.