Another class is called surgical illustration and it's really hard because the attention to detail must be ridiculously high. What thickness of suture ("thread") is used, at what angle is a scalpel held, the anatomical field must be exactly correct of course. Anyway, although it's 2D illustration, in order to get perspective and scale absolutely correct, it's recommended to model tools at least in 3D, so that's what I've been doing, although getting good reference is very difficult (if anyone has sources...).

You probably can't see anything here. I'll post something better next time. The laparascopic instruments are all very low poly, but the shapes should be pretty close (I'm hoping).