This is a paper on Sketching in 3d space via 2d drawing surface, and using rules and algorithms to generate the final 3d shape into real world space.
http://www.cs.ubc.ca/~brianxu/publications/true2form/
Some sketch examples on the site.
Also back in 2009 I Love Sketch was also a digital paper of a similar nature, the software has never been publicly releases.
3:34 – Example sketch 1.5x
These would be amazing to get my hands on but I don’t see that happening.
wade-wws 