Hello,

If you do another challenge like this, I recommend you number your boxes as you go along so that it is easier to critique and keep track of. It also helps to upload your work in chronological order so we can see how you improved. Right now it's really hard for me to see which concepts you are currently struggling with.

Foreshortening - Most of your boxes are foreshortened quite a bit. While the lesson plan states that it is good to practice foreshortened boxes, it's better to practice boxes that have shallow foreshortening more frequently. So I would like you to have your lines converge less quickly, so that the vanishing point ends up farther away. You can read more about foreshortening here.

Convergences - I think your convergences look nice, but it is hard to improve these when there are other misunderstandings in your boxes.

Convergence Lines - I think you are having difficulty with knowing which direction convergence lines are going. Convergence lines alway extend away from the center dot of the Y You could after you've drawn your initial Y, add arrows to the ends so that you know which direction to place your convergence lines. Another way of thinking is that your convergence lines go away from the planes visible to the viewer. Aka, if you can see the bottom of your box, that set of lines converge above the box. Here's a useful diagram.

Here are some critiques I made, red being convergence lines and blue outlining the plane facing the viewer. The way I drew these would make them in 1 point.

here is another page with my convergences.

Points of Perspective - Another thing that may help you is to decide before you start your box whether you will be in 1,2, or 3 point perspective. You only need a Y for 3 point. Remember in 1 point two sets of lines are parallel, and one plane faces the viewer. In 2 point only two planes are facing the viewer, and one set of lines is parallel. In 3 point no set of lines is parallel and three planes face the viewer. If you look at the bottom right box of this page, it is in 2 point perspective because you can only see two planes facing you. There should be one set of parallel lines, and this should be the lines that are currently converging on the left. If you wanted to make this box in 3 point, you'd have the make either the left or right plane face the viewer. I hope this highlights a misunderstanding.

I would recommend you reread the Lesson 1 boxes notes to review different points of perspective. I also recommend this video. And especially this video to follow along with.

I hope I could help you out! Congrats on completing the challenge! Remember that the discord server or discussion forums on drawabox are good places to ask questions or get partial critique. If you have any questions for me feel free to ask!