These were really fun! The garlic one was done on tracing paper over my original sketch, which I accidentally ruined with some spilled tea. I did not stop to establish proportions on any of these because I was hubristic and impatient, and some pretty egregious proportional errors resulted, especially on the skull. Oh, well. Critique would be greatly appreciated and is badly needed, as I don't feel confident that I understand what I'm doing.

You should provide a link to the ctrlpaint.com lesson you mentioned in the video.

These look almost painfully "off" to me, but I can't pinpoint exactly what's wrong--this assignment has revealed just how limited my understanding of light really is! As you can see, I completely lack any understanding of where to place the cast shadow. I know that lines can be drawn from the light source and through the endpoints of the terminator to project one axis of the cast shadow, but I don't see how those lines alone give you enough information to place the cast shadow--how do you its angle and degree and center point (if those are even the right terms)? Am I missing something obvious here?