Hey there! I don’t really see a major issue with the depth in the boxes you’ve drawn (although I’m not entirely sure what you mean by “spacing them correctly”). If the goal was for the third upper vanishing point to be the same for all the boxes that share the same horizon line, then in that case there is a small issue, since not all of the vertical lines converge toward the same vanishing point. On the other hand, I would recommend practicing by drawing different boxes where each one has a different angle and doesn’t share the same horizon line. This will give you more freedom to experiment with both more neutral and more dramatic angles. Another option is to draw a group of shapes that share the same vanishing points. For example, you could draw two boxes and a cylinder, and then redo this exercise with another set of shapes or the same ones you previously drew, but from a different angle. I really like this exercise as a warm-up, it’s fun and very useful :D One more small observation regarding the cylinder: Remember that the ellipses should share the same minor axis, and that minor axis should converge toward the same vanishing point as the cylinder itself. Otherwise, the minor axis will converge differently, which causes the ellipse to have a different degree, like what happened with the cylinder I corrected. Hope this helps, and keep it up! You're doing it great :D
