I recollect seeing something about ice cubes a while back (non-Moi).
Probably keyshot related?

- Brian

A couple of links:
http://designertoday.com/Tutorials/Cinema.4D/6873/Making.Realistic.Ice.Cube.Models.in.Cinema.4D.Tutorial.aspx

https://www.keyshot.com/forum/index.php/topic,6351.msg29702.html#msg29702

...one of Max Smirnov's scripts...?