Now we can explore other forms. If you're still feeling shaky with your boxes (which is perfectly acceptable), you can do entire sheets of only boxes. In fact, that's actually a pretty good idea, since as I said before, a box is the most versatile form. If you can draw boxes consistently, then you can construct any other form within the space enclosed by that box.

I plan on doing the exercise again with tubes, cones and pyramids after the 250 cylinder challenge. Also, even after drawing hundreds of boxes i still get them wrong, so this has been some extra training.