[Howe_zat]

I actually tried that and it's quite difficult for me to do all of that. Particularly the bit about "rotating individual elements" and "substitute objects" - I'd have to come up with a new mental image rather than do that.

I already know that people have a wide range on how complex a thing they can visualise from my course (Maths). It involves a lot of geometric diagrams and graphs to understand concepts. Some people can just picture these things in their mind fine, and since most of these things involve how said diagrams change with variables, can see how they're altered with differing parameters. I tend to struggle with this, so my notes are full of little drawings in the margins where I've drawn a few things rather than just relied on mental pictures.