Hello Lefebul! About the cylinders, I think you actually showed qutie a bit of progress, so I wouldn't worry about that!

Starting with your simple cylinders overall you're doing a good job drawing them cleanly and changing the degrees of the ellipses according to the foreshortening. You're also making the degree changes more dramatic when the convergence of the foreshortening gets more dramatic, which is exactly what you should be doing!

You're also doing a good job overall drawing the minor axises, so nothing to comment on that neither.

On the cylinders of boxes I can see that by the end you have made good progress both with drawing boxes themselves as with eyeballing squares in perspective, which is one of the main parts of this challenge.

One important thing I want to comment is that sometimes you aren't alligning the ellipses directly to the minor axis on the boxes. You probably did that because you were thinking about how you could change the ellipse to make it hit the 4 dots and all the other conditions, but no matter what you do the minor axis is fixed, you can't change it.

Whenenver you start to think about drawing the ellipse, never think about changing the minor axis. Only things you can modify is how big the ellipse is, and how much degrees the ellipse has, so you can kind of constantly ghost the ellipse alligned to the minor axis varying those 2 things until you get it as close as you can get it. One example on which you allign the ellipse to the wrong axis is the 165.

Another thing is something about the squares. In general you've ended up drawing squares, but sometimes they get a bit off. Whenever the perspective of the box is well drawn and you can't make the ellipse fit touching the four dots and allligning it to the axis it's because the sides of the box the cylinder is in aren't actually squares. Here's one example on how it would have been closer on the 165. As you can see you can play with the foreshortening to turn something that wasn't a square into a square, so make sure you play around with it if you haven't already.

This is something suuuuper important that you will need whenever you'll want to freehand cubes on perspective, so you probably want to keep practicing it as freehanding cubes is super useful.

That said overall you've done a p good job so I'll mark this as complete. Good luck on lesson 6 and don't forget to ask any questions you may have!