Its interesting to compare artistic drawing to drafting. My observations from a year of drafting in high school (Future engineers need to be able to make and r

Its interesting to compare artistic drawing to drafting. My observations from a year of drafting in high school (Future engineers need to be able to make and read blueprints was a fad a couple decades ago) and work with people in the field, there are people who can do three dimensional transforms and manipulations in their head with little effort beyond the mere mechanics of pencil on paper (or fingers on CAD workstation). There are also those who cannot visualize complex shapes in three dimensions. Just like you can't verbally tell people to train harder to grow taller it does not appear possible to learn how to visualize. I've observed those who can't visualize have all kinds of interesting coping mechanisms ranging from simply asking for help to leaving the field entirely to really elaborate memorized heuristics. Either you can, or cannot, visualize a basic transmission for a crane complete with which direction the gears rotate. No amount of staring at a blank sheet of paper will help, and practice does not help those people who can't and merely wastes the time of those who can. Apparently you can train creativity and style, but the mental act of three dimensional visualization is either functional or absent.