Hello! I'll be critiquing your 250 Box Challenge this afternoon.

Early in the challenge, I noticed that you did a few boxes in one-point and two-point perspective. It was only a handful, but I just wanted to comment that this challenge is meant primarily to test creating boxes in three-point perspective, although you will find two-point perspective especially useful lat into the course.

I also noticed that some boxes tended to distort as you tried to place vanishing points. Look at box 8, for example. After drawing out your initial Y, you should attempt to draw all edges as converging, so try to route them back to your initial Y to reduce the divergence on the external faces. This is also present, albeit to a lesser extent, in some later boxes, as well. For instance, box 44 has some issues with divergence too for similar reasons.

I would also reccomend to draw boxes larger when you are drawing them as warmups. This will allow you to activate your shoulder and make longer, more fluid lines. Don't be afraid if your error-checking lines overlap with your other boxes! It's worth letting there be a bit more clutter if in exchange you get to practice more fluid, confident markmaking. It's also reccomended to put a little bit of line weight on the edges of the box that compose the sillhouette, since it makes the form more solid and readable.

I noticed that you began to nail general convergence at around box 110, whereby now you tend to have each set of parallel lines converge to two distinct vanishing points. This is good progress—now, your goal should be to push these vanishing points together and to hit more uniform convergence. You tended to do this more consistently with boxes that had a medium level of foreshortening.

Make sure to keep in mind the size of each face of the box in relation to its perspective. For example, the green convergence for box 151 can be understood in two different ways. First, convergence to a single vanishing point. This can be especially hard for this sort of a box, since the standard VP set by right two green lines would cause the opposite face of the box to be crushed a bit and for the lines to get closer. However, this would make sense proportionally, since this face in perspective would get smaller as it falls away from the viewer. However, I would like to give kudos to the other two sets of lines on this box, along with the convergence for the other lines on this page—they are all very well done. This trend is kept up later into your box challenge, as well, with regular convergence of three lines to each vanishing point.

It seemed that late into the box challenge, such as for box 213, you struggled most with convergences for boxes with shallow foreshortening. This makes sense, since these sorts of boxes may have lines that look comparably more parallel than other sorts of three-point perspective. It could be helpful focusing on these sorts of boxes for your warmups.

Overall, solid work with the 250 Box Challenge! I noticed considerable improvement from the first page to the last. The main issue with your final boxes tended to be the internal corner, but that isn't a large concern for this course.