>>5982371> the box isn't meant to keep the character in perspectiveIn this situation it's a secondary and eventual objective, more about breaking down the figure into relative positioning. Taking note of what's situated in terms of placement, angle, and direction, what's in line with each other and otherwise.
Top set is exampled really well, first drawing complicated poses in the simplest perspective, establishing points of reference. Then when draws in the ground plane at any perspective he can translate those points of reference upon the new ground plane.
Bottom left is showing he fucked up, the torso wasn't bent low enough and figured out how to make the adjustment. Using angled incline planes like a box lid tilting to show how to fix the torso
Bottom right garbage, even knowing what he's going for I'm confused as fuck by what he's trying to show.
