These boxes are looking much better. Your sense of space has continued to improve and you are handling converging lines well for the most part. You still have some skewing going on, so going back to the infographic I posted on your last critique, let's talk about parallel lines in perspective a little bit. The key take away is you must look at all of these lines in tandem and as anything about them changes (a line or the vanishing point) everything changes and adapts. This means you must be thinking about and looking at all your parallel lines simultaneously and take into account the interior angles as your draw. For example, students often draw boxes one plane at a time. They do the first plane making sure all of the lines are converging well then they move on to the next plane drawing that one with no regard to the lines they previously put down. This results in two points of convergence isntead of the one vanishing point. It definitely is tricky at first to "step back" and view all of the lines in tandem, but with mindful practice it does get more intuitive and everything falls into place.

I will now be marking your challenge as complete and you are free to move on to lesson 2. Keep up the good work and remember to keep practicing boxes in your warmups.