20180509 cactus | articles sketchbook
Draw plants ~ A tiny mistake here or there? That's not so bad. Portraits are more difficult, we all know what a face should look like and because of this, it's easy to see where you got the proportions wrong. With these complex abstract things it's not so noticeable where your drawing is off.
Things are 3d but paper is flat.
Try to get your drawing to read as if it's an actual thing in 3d space. Remember to find the big shapes first and then use contour lines to show how they sit in 3d space.