Howdy, TA qzhans here!

First, superimposed lines. You’ve in general kept a good grip on those finicky horsetails, but I see a few where there’s fraying at both ends. Remember, no matter how long it takes, slowly and precisely place your pen before making that line. Additionally, I’m seeing wobbling on a lot of the longer lines. Once you've began your stroke, that angle is law, and you have to follow it through, even if it means you careen way off into another line above or below.

Moving onto ghosted lines, I’m liking the confidence here, and that wobble from the previous exercise seems to be gone. I like the density too.

Your ghosted planes are nice as well. However, I noticed you drew an extra line here and there, perhaps to correct some perceived mistake. Remember that all lines we put down are law, and laying down more lines to fix something will only create more contradictions and draw eyes to a mistake.

Moving onto your ellipse tables, I like that you're keeping your ellipses tightly packed within the bounds that you've set. There's expected room for improvement in getting your ellipses to be tight and tidy, but drawing through with confidence is more important at this stage, which you mostly are; there does seem to be a little jaggedness, but I think that’ll improve over time. Tip for this in the future, though, try and get more variety in size in there, trying some extra small ones for a box (you’re pretty good here on the big ones).

Your ellipses in planes show an improvement in smoothness. I also like how you don’t stretch out your ellipses needlessly to hit the bounds, opting instead for a confident ellipse.

Next, your funnels generally do a good job of aligning to the minor axis that you've set and I have no complaints. Overall, your understanding of how to execute ellipses is solid. Next steps would just be to do even more, and perfect your ghosting technique so you can tuck in those tails every time.

No problems with plotted perspective either!

For your rough perspective, I’m pleased to see that you are applying the error checking method correctly, extending your lines parallelly back to the horizon line instead of directly to the vanishing point. In general, you kept your horizontal and vertical lines parallel and vertical to the horizon line respectively as well. The problem I do want to address is a little bit of degradation in your line work, with an extra line here and there (like in the planes exercise), perhaps to correct some perceived mistake. While in a lot of places this was added line weight, it can tend to get wobbly. Even for reinforcing lines, draw them in one, prepared stroke, and if you’re off a little bit that’s okay; this is practice.

And now, the one you’ve been waiting for: rotated boxes. Before anything, I wanted to congratulate you on its completion; it's not something you're really supposed to be ready for. In general, I like how you’ve structured this exercise, mostly keeping the gaps between boxes consistent and drawing through each box (outside of a tricky few at the borders). As a result, the illusion of rotation is quite nice here. This exercise went haywire for you when you started to not adhere to these ideas; for example, the box in the top right that’s sticking way out would’ve been a lot easier had you kept the gap between it and the other boxes as tight as you kept everything else. This is a solid attempt however, and what’s more impressive is that you managed to resist the urge to re-draw any messed up lines.

Finally, onto organic perspective. In general, your boxes do a good job of shrinking and growing as they move through space, although you’re right in that it could have been exaggerated somewhat more.. I'm pleased to see a little bit of overlapping here and there as well, but you could have done a lot more. Check Uncomfortable’s example.

Overall, this is a nice submission, one with a lot of understanding and effort put in. As long as you keep pulling these out for warm-ups while keeping up the attention to the instructions, these will all shape up in no time. Good luck on the 250 Box Challenge!