Congratulations on completing the challenge!! Your boxes are very clean.

There are some things that I've noticed and would like to point out.

For some of your boxes (see the list below for examples that I've picked out), it seems to me that you might have struggled with making your lines converge to a vanishing point.

Let's take a look at box 231, specifically with the lines converging leftwards. What I've noticed is that the two faces created by these lines (the one facing the viewer and facing away) seem to have their respective lines travelling to two different vanishing points, instead of all being aimed towards one in specific. For the sake of what was happennig during the exercise, we weren't dealing with lines that converge in that way, and instead dealing with sets of the box's "parallel" lines converging towards one vanishing point. Try not to think about each pair of parallel lines making a shape's face as a 2-D shape in-of-itself. That pair shares the same vanishing point as another pair, which is what makes it 3-D. If it helps, you could try thinking about how all four of these parallel lines converge to the same vanishing point.

Some more examples (only if you want to look at more of them): 68, 128, 229, 231 to the left, 190, 202, 209, 218 to the right

Another similar problem arises in some other boxes. Let's take a look at box 176, specifically the lines converging to the left. The top three lines seem to be converging towards the same vanishing point, but the bottom one doesn't. What I said before about thinking about all four lines converging to a vanishing point stands true here.

Similarly to what I said before; when thinking about all four lines, you can try to compare the rate of convergence between what lines you have on the page to judge how hard/soft the line you are going to make is going to converge. Still looking at box 176; if you had drawn the first 2 leftward-converging lines from top to bottom, you could've used that information (the fact that they don't converge harshly) to denote that the bottom one probably wouldn't converge too harshly, too.

In summary:

• use the information you can gather from the lines you have on the page (rate of convergence, length of line, etc.) when making other lines, so that you will have a more solid, consistent form.

Good luck with your future endeavors, and keep up the good work.