Congratulations on completing the 250 Box Challenge! I read your note so I will keep that in mind for your critique.

You made some really good progress during this challenge. I can see that your boxes are drawn with straight, confident lines. You do still struggle a bit with adding additional weight to your original lines. But you showed some improvement there too. You also do a better job of getting your sets of parallel lines to converge more consistently towards their shared vanishing points.

When you go to add weight to a line it is important that you treat the added weight the same way you would a brand new line. That means taking your time to plan and ghost through your mark so that when you go to execute it the mark blends seamlessly with your previous mark. This will allow you to build and create more subtle and clean looking weight to your lines. Just remember that the confidence of the stroke is far and away your top priority. Accuracy is something that you will improve on as you continue working through Drawabox and practice ghosting.

While your convergences do improve overall I think this diagram will help you further develop that skill as you continue through Drawabox. So, when you are looking at your sets of lines you want to be focusing only on the lines that share a vanishing point. This does not include lines that share a corner or a plane, only lines that converge towards the same vanishing point. Now when you think of those lines, including those that have not been drawn, you can think about the angles from which they leave the vanishing point. Usually the middle lines have a small angle between them, and this angle will become negligible by the time they reach the box. This can serve as a useful hint.

Congrats again on completing the 250 Box Challenge and good luck with lesson 2!