Thank you for sharing these valuable techniques, Siobhan. I couldn't imagine that I can draw the interior in detail. Lots of mistakes and I was lazy to take the ruler, but while working on it, I was surprised that step-by-step all negative spaces are coming up together in the whole piece.

Still can't believe that I could draw the horse upside down)) even though he looks different from the reference photo

The only technique that I can't get any progress on my side is dynamic drawing. My brain becomes very stiff and I draw too many wrong lines. I think I need to read 2 books that you recommended to understand more about how the brain functions. Meanwhile, when I need to draw a human, I use contour drawing, which I learned even earlier from another your class. It helps me. Thank you for your teaching.