A test on how to fil a piece of glass with a material.
Still not sure how to do it, I did it with an animated Alpha gradient.
The empty tube is actually 4 sweeped Helixes, so multiple layers of Glass in there, increase the circle you sweep with for every instance.
Nice trick learned, animate a camera over a spline, with the "align to spline expression" tag, and make a "target expression" tag, so the camera is always looking at the tube,
Also, to improve render times, I made a compositing tag for every glass object, and toggled off "seen by AO (ambient occlusion).
Next stop is learning about lens flares!
