I've started making a glass block window, and I am very pleased with the progress so far.

It looks like real glass.

The surface is wavy like the real deal, too.

Next up will be figuring out an approximation of a hopper vent (the tiny window insert that allows for airflow). :D

As you know, I freely share nearly every process when I make things with very few exceptions. This process is one of those exceptions, so there is no tutorial or materials list at this time.