HOW LONG IS INFINITY?
Well, in this case, it's about 90 meters.
That is, if it works. (If the motion of the camera and the lighting are correct, when played as a loop, this animation should emulate passage down an infinite corridor).
The backplane of this page is a single frame from the anim, "tunl."
Or, for those less faint of modem, here's a 45-frame animated gif. The better resolution may make it worth the time it takes to load this 527k file.