Hello I'll be handling the critique for your 250 Box Challenge

Linework

-Starting by your linework, I can see that your lines are drawn with a good deal of confidence while maintaining their accuracy, which means that you are using the ghosting method to good effect. The same goes for the hatching lines, it is good to see that you are giving each one of them as much time and attention as necessary, so I hope that you keep displaying this patience in the future.

-I like to see that you are using lineweight, it is not a necessary requirement but it is good that you are getting used to it. You are using it properly on most of your boxes, there are only a few instances where you take it a bit too far, it is important to keep in mind that if you end up making the lineweight too thick you will end up taking the solidity of your forms away and turn them into mere graphic shapes, that's why it is better to keep it subtle, only add one superimposed line and no more. I also want to quickly redirect you to this diagram which shows how to correctly apply lineweight.

Box Construction

-You have made good use of the line extensions to get more consistent convergence and all of the sets of lines of your boxes converge which is correct. The only thing that you have to keep an eye out for is lines converging in pairs as shown here.

One thing that can help with this is to start thinking about the relationship between each pair of lines of any given set and the angles they form respective to their vanishing point, this relationship is exemplified here, you can see that the inner pair of lines is always quite similar and the outer pair can vary a lot depending on the location of the vanishing point, the further away you place it and the closer to parallel they will be.

-You should also keep experimenting with the orientation and foreshortening of your boxes, looking at your work I can see that you experimented a good deal with the sizes of your boxes, which is good but most of them have a somewhat dramatic foreshortening, so try more to give them more shallow rates, just keep in mind that due to perspective our sets of lines will never be fully parallel or diverge away from one another. And lastly try to give each one of your boxes as much room as possible, I don't know what page size you are using but there are some pages where you leave a good deal of empty space, it doesn't matter if the line extensions start to overlap with other boxes. This challenge is all about building an intuitive sense for how to draw boxes with consistent convergences, and experimenting a good deal will help you to get a better grasp of the concepts we are exploring in this challenge.

Okayyyy, that should be about everything I wanted to address, I'll go ahead and mark this lesson as complete