It goes back about 4000 numbers.
I vastly Improved The Origin render. If you look, the upper half has a nice light grey gradientish tone to it, and the glass is actually reflecting soemthing that isnt just the plain white ground. You'll also notice a very slight blurred reflection on the ground, as was on the Pi render also.
Blah blah you know the drill... Maya 6/Mental Ray... glass done with custom written dielectric physics shader, plane done with a regular DGS material.