Vlad, is it rendered B & W or was that done afterward?
There are no post actions, only print screen and paste to paintbrush. The main purpose of this work was to obtain images of pure transparent glass with a smooth surface
(so only white color, no bump, no blur, and no glossy etc.).
I was interested to find out how close I can approach this ray-traced glass from English Wikipedia (https://en.wikipedia.org/wiki/Ray_tracing_(graphics
However, the color of course was used for the experiments with the glass (please see attacments).