Upside Down Woodwork

Done as part of a practice session with poses of 2 minutes in length.

My current goal is: Improve at correctly controlling & understanding 3-point perspective in a scene and/or environment.

Hey, everybody. Poly, here. And this is my latest scene and environment of the woods, all flipped vertical. Because, I'm really trying to learn how to see and draw. What do you think? Did I do a really great job on my observations? Could my approach be any more the best? Or am I all set? Especially with some 3-point? Critiques, please.