I have ported most of “ln, The 3D Line Art Engine” by @FogleBird to javascript so it can be used on Turtletoy. The engine can create drawings of 3D scenes, that you can plot using a pen plotter, which naturally
3D Line Art Engine (port)
Procedural cubic city
This is an experiment in drawing a simple procedural city. The basis of the city was initially a Rhombille tiling (2D). By drawing randomly placed doors and windows on each hexagon, the illusion of a 3D city is created.
Turtletoy
I spent some spare time on creating Turtletoy: an online platform that allows you to create generative art online using a minimalistic javascript Turtle graphics API.