/ic/ - Artwork/Critique

Alright. Time to start studying perspective (again). Trying Hogarth figures with construction has taught me that perspective is fundamental to draw figures from imagination, and that drawing from reference is mostly a begtrap (level 0: xerox machine). In order to draw something like the pic on the very right, I will need to grind boxes.
Do I really have to do Drawabox or are there any good alternatives? I'm not really impressed by the owner's works. I don't see foreshortening or anything that I'm attempting. It's just straight poses which I can already do without ref.