Hey there Teling! Congrats on finishing the entire challenge! One of the things I love about your submission is that I can see such marked improvement from the first page to the last, it's so clear that this challenge did a lot of good for you.

First, your line work! It's a bit shakey at first, with a few curves, a few wobbles, but as you progress, it's clear that you really get the hang of it, either by using the correct pivot or the ghosting technique, or both! By the end, your lines are confident, clean, and straight. Really nice work there!

As for your convergences - this is really good work. At the start, things are pretty shaky - there are a few places where you don't have a lot of foreshortening or the correction lines diverge instead of converge. It doesn't seem as though you fully understand the box as a 3D form on a 2D plane. However, as you progress, that really seems to click and by the end, your boxes look like solid forms and your correction lines start to converge consistently. I really love seeing that kind of learning, really excellent work!

I'm going to link a few extra notes - we provide them at the end of every challenge as a matter of course. They go over the angle of each set of parallel lines as they approach the box and how keeping an eye on this relationship could improve your convergences. Also, considering each line in relation to the lines with which it shares a vanishing point rather than the lines with which it shares a plane or a corner could do the same.