I'm surprised there wasn't at least a brief mention of POV-Ray (povray). One of the first procedural graphics engines which is still active, and still used as

I'm surprised there wasn't at least a brief mention of POV-Ray (povray). One of the first procedural graphics engines which is still active, and still used as an optional backend of Blender http://www.povray.org/ http://www.povray.org/