Hello I'll be taking a look at your 250 box challenge.

-First of all I want to make a quick suggestion about your material, I can see that you are working on a sketchbook, consider changing to loose pages so that you can draw more comfortably without having to worry about the spiral. When doing these exercises about spatial reasoning you want to get rid of all distractions.

Now I’ll address your linework.

-Keep in mind that you also have to ghost your hatching lines, this makes the challenge more tedious and time consuming, but it is a good opportunity to improve. It seems that you improved them as you moved through the challenge, but keep aiming to be more tidy with it.

-When adding the lineweight I’m pleased to see that you have only added it to the silhouette of the box, keep in mind that we want to keep it subtle, so you just have to add one superimposed line. If you miss, do not try to correct it by adding another line, this will only make the mistake stand out even more.

-You did well extending the lines, you always did it correctly, and I’m also pleased to see that you have kept the vanishing point outside the page.

-I think that throughout the set you kept the orientation of the boxes similar, you could benefit from trying more orientations, if you have trouble with this check out this image that you can use as reference.

-I can see that you avoided drawing any sets of parallel lines, which is good, and as you moved on through the challenge I can definitely notice an improvement in the way you estimated the vanishing points. Just be mindful of lines converging in pairs as shown here, as you practice you will become better at estimating the vanishing points and eventually you’ll have your lines converging in sets.

-You didn’t have much trouble with diverging lines, all of them seem to be converging, so good job here.

Overall you showed a good deal of development and improvement during the challenge so you can continue.