7:06 PM, Wednesday November 24th 2021
To start, I definitely appreciate the heavy emphasis on the use of the line extensions - extending them a healthy distance away can definitely help show us more about how those lines are behaving, or at least to make those behaviours much clearer to the naked eye. So for example, this box from this page was well done - it wasn't perfect, but you drew the box, then extended the lines correctly to give yourself ample information to analyze and ultimately to alter your approach for the next page.
That said, if you look at all of the other boxes on that same page, and those on the pages that follow, you're running into a critical issue in your line extensions - you're consistently extending one set of lines on each box in the wrong direction. So as a result, instead of analyzing the way in which each set of lines behaves as they move farther back in space (and whether or not they're actually converging in that direction as per the rules of perspective), you end up with some confusion, with one of those sets of lines coming towards the viewer. In most cases, it looks like that set of lines is converging in that direction, which looks correct, but if they're converging in that direction (towards the viewer), then that means they're actually diverging as they move away from the viewer, which is incorrect. As a result, you're left unaware of a key issue with your boxes.
Now, this is something I go over in these notes from the 250 box challenge page (where I go over exactly why this is incorrect in greater detail), there is an easy rule of thumb you can use to avoid making this mistake altogether. Given that we're using the Y method to construct our boxes, we can apply out first line extensions to the Y itself, ensuring that we extend from the center point of the Y (which usually represents the corner closest to the viewer, due to how the Y method works), then extend along each of the arms. This establishes the direction along which we extend all of the other edges. Here's a diagram explaining the approach.
When it comes to your linework, overall you've done fairly well - your individual edges are drawn to be quite straight for most of them (there's the odd instance of wavering where I think you may have gotten impatient, but generally the majority of them are straight and smooth), and your hatching is fairly consistent and you're getting better at limiting having them overshoot past the edge.
Unfortunately, since you have extended your lines in the wrong direction with the vast majority of these, we are going to have to do some revisions for you to demonstrate that you both understand how to extend them correctly, and how to analyze the results and apply that analysis to your next page. You'll find your revisions assigned below.
Next Steps:
Please submit an additional 30 boxes, being sure to extend your lines in the correct direction.