Hey, and a big congrats on finishing this challenge. Looking over it, it seems like you started off strong, and still managed to improve a bunch by the end- nicely done.

Start off, your line quality is great. It was so to begin with, but, by the end, your line-weight is snug, and subtle, and your hatching tight, and parallel. Moving on to the boxes themselves, the only issue I noticed with them in the beginning was one relating to their back lines (not uncommon- these are notoriously annoying!) There’s a method to deal with them, that we usually introduce students to at the end of the challenge, but, looking at these last few pages, it doesn’t seem like you have much need of it. xD Nonetheless, take a look at this diagram, and take particular note of the angle at which each set of lines (the ones that share a vanishing point, not a plane) intersects the vanishing point. The smaller this angle, the closer your lines are to being parallel. To put it into perspective, the center lines of the box are usually close enough to each other to have a really small angle of intersection. So close, in face, that it behooves us to think of them as parallel. This not only eliminates some guesswork, but it gives us a guaranteed correct answer, allowing us to focus our efforts on the more annoying outer lines. For these ones, too, you can draw some interesting conclusions, as the further one of them is from the center of the y, the more dramatically it’ll need to converge (that is to say, the larger its angle at the point of intersection), for it to be correct. Try to think of these relationships the next time you find yourself constructing a box, so that this may become yet another tool in your toolset.

For the purposes of this challenge, however, you’re more than good. Your line quality is great, your convergences correct, and you’ve tried out a bunch of different boxes, too. Well done, and feel free to move on!