Numbers such as those on the cover of "Technicheskaya estetika" 1989/12 magazine created in 3D for orthographical projection. https://issuu.com/0083398/docs/tech_aest_1989_12
This script for OpenSCAD creates 3D objects in accordance with the specified parameters. They can be substituted according to the viewing angle. The objects are made up of cubes with two edges of the same length, and third vertical edge changes length depending of the angle of view.