Arrows

1. Mistake on lines: pass

2.Arrows not compressing: pass

3.Lineweight related: pass

Organic Forms

1.Mistakes on lines: pass

2.Not following the simple form they need to be; they should be 2 identical balls connected by a tube of consistent width: pass

3.Degrees of the ellipses/contours don't change, they stay static: pass

4.Not hooking contours: pass

5.Misaligned ellipses and not drawing the axis line: pass

6.Ellipses not touching the boundaries, or getting out of them: pass

Texture Analysis

1.Doing dotting or any kind of hatching to achieve transition: pass

2.Not doing a seamless transition on the gradients, if either the black bar on the left or the white bar on the right are really easy to spot because the transition isn't smooth enough: pass (very well done in this case)

3.All marks on this exercise should be done purposefully, and by looking at the reference before, so scribbling or doing non planned marks is a mistake: pass

Disections

1.Not wrapping the textures around the form: pass

2.Not breaking the silhouette: pass

Side note: Great rendering of the textures!

Form Intersections

1.Repetition of lines, lines not being confident, not planing lines, not ghosting, clear divergences, not drawing through ellipses, etc.: a few shapes aren't drawn through

2.The forms need to have consistent foreshortening: pass

Organic intersections

1.Not drawing simple forms. On this exercise the forms should be kept simple, just like in the previous organic forms exercises. 2 identical balls connected by a tube of consistent width: pass

2.Shadows sticking to the forms. The shadows have to follow the form of object they're being casted on, not the form of the object that casts it: pass

3.Not ghosting lines, not hooking the lines, adding linweight by tracing instead of drawing confident lines etc.: pass

4.Not drawing through forms. You should always draw through forms, just like in the form intersections exercise: pass

5.Drawing non stable forms: pass