NPR Non-Photo Realistic Rendering
Non-Photo Realistic Rendering typically mimics traditional architectural rendering styles. However, there are many approaches to NPR, there are many post production techniques applied to renderings and photos that mimic traditonal styles. In the world of architectural design the leading design modeling software is probably SketchUp, which natively outputs imagery that is NPR.
Wikipedia Page: https://en.wikipedia.org/wiki/Non-photorealistic_rendering