12:35 PM, Tuesday July 6th 2021
Thanks a lot for this feedback!
I didn't fully grasp the difference between form shadow and cast shadows, but now I think I get it.
Here are the requested additional drawings:
Note that I was really hesitant to draw the Pistils down to the center of the flower, as I thought it would be the base really messy. It really makes the flower in the middle hard to see/comprehend.
Do you still recommend to draw them like this?
Other than that, for these two drawings I didn't add any texture and there shouldn't be any form shadow.
I realized afterwards that I didn't draw the center-line for the stem of the flower, however I drew center-lines for everything else (except the pistils, as the tube was too small).
Also, looking at the cactus, I think it could benefit from some contour-lines around the horizontal axis to make the volume more apparent.
Thanks, take care!