1 hour class: 10min and 25min
© 2019 Ian PFor the 10 mins I attempted to build on the boxes to get a proper 3d-looking sketch with reasonable proportions.
For the 25 mins I put more effort into the proportions and added more detail and shading, but still with the boxes as the under-drawing to give depth and twist.
It's a good exercise, but I suggest you put more effort into the overall posture. Because I think they're a little stiff.