Tested and from what I can tell it's completely random.

This model was made using an open source software I've developed called “EasyCAD”, meant to make 3D design as simple as possible. You can try it yourself for free using the following website: [https://perceptronic-systems.github.io/EasyCAD/](https://perceptronic-systems.github.io/EasyCAD/)

The software is still under development, but if you'd like to contribute or learn more about the source code, the github repo can be found at [https://github.com/Perceptronic-Systems/EasyCAD](https://github.com/Perceptronic-Systems/EasyCAD)

Have fun! :)