Unfortunately, based on a few factors that I can see here, I think you've rushed through your work here. Those factors include:

• There's supposed to be a cooldown of 14 days between homework submissions. Unfortunately, because you didn't submit your last revision as a revision, and I ended up having to post the critique against the original submission, it messed up the part of the system that enforces that cooldown, so you were able to submit sooner. But regardless, that means you completed the 250 cylinder challenge in 9 days, averaging something like 27 or 28 cylinders per day, assuming you got to work on it immediately. That's a ton of cylinders and if you're properly following the 50% rule, would make it very difficult to draw each cylinder to the best of your current ability as required by the course.

• You appear to have completely missed the instructions about incorporating a variety of rates of foreshortening to your drawings, which you can see here, in bold.

• For the cylinders in boxes, you are not applying the line extensions to the ellipses. The instructions explain how we are to extend the minor axis and the two contact point lines for each ellipse, to check how far off they are from converging towards the box's own vanishing points. This is integral to the exercise, and helps us improve our capacity to understand how to draw the proportions of a given box regardless of how it is oriented in space, to be able to feature two opposite ends which are squares in 3D space (so they can contain actual circles in 3D space).

As a whole, it's very clear that you tried to complete this exercise quickly, rather than actually ensuring that you did it correctly, and as such, I am going to need you to complete it again from scratch. When you do, do not complete the two sections together. Do the cylinders around arbitrary minor axes first, then the cylinders in boxes. Also, please number them.

There is one last thing I want to call out - from what I can see, you didn't just neglect to vary the rates of foreshortening. You actually drew these with no foreshortening whatsoever - you've strived, apparently, to keep the sets of lines which are parallel in 3D space, parallel on the page as well. This is incorrect based on the core tenet of perspective, which states that as something moves away, it will be perceived as being smaller.

What you've done here is basically drawn all the sets of lines as though their vanishing points are at infinity, as discussed back in Lesson 1. This is not something you can assert - rather, whether or not a vanishing point is at infinity depends on the orientation of the lines it governs. If the lines are running perpendicular to the viewer's angle of sight (if they're moving straight across their field of view, not tilting towards or away from them), then the VP will be at infinity. As soon as those lines tilt towards or away from them, then they'll start to converge. It's that convergence that allows the viewer to determine just how much of the length of a given form slips into the unseen dimension of depth - whereas if it's running right across our field of view, we can see its full length in its entirety, right there on the page.

Since we're rotating these forms randomly in space, we can more or less assume that they're never going to be aligned so perfectly as to run perpendicular to the viewer's angle of sight. So, there should always be at least some convergence, even if only very slightly.

So, circling back - you will have to complete this challenge again, and submit it as a fresh submission. Please refrain from rushing in the future - this is the second time you've jumped into a lesson and not paid enough attention to what was actually being asked of you.