Hi Diotcoke, Sloppy this side. Glad to see you here.

The first thing i noticed about your submission is how neat it is.

Lines: The strokes are confident. There is a curve present in the longer lines but that is expected, and it gets less on the next page. Ghosted planes and ghosted looks great.

Ellipses: I can see you struggle a bit with the shapes of ellipses at some places, but overall it's a nice submission. I really like how your strokes are tightly close. If you made ellipses in funnels in horizontal orientation then it's good improvement from previous page.

Boxes: A few thing i notice, You missed oen back vertical edge of a box on section 3 of second page of Plotted Perspective , and 2 vertical edges of a box in section 1 of Rough Perspective. The deviation of some of the edges is far off form virtual point but it will get better, try to spend bit more time in point selection before making the stroke. One more thing , it's not a mistake, the conversion of edges of lower face of the boxes along the lines of initial cross is hardly noticeable. It can be improved if you increase the rotation of boxes by a bit. And at last , the Organic Perspective, I notice some pointy boxes. Such thing happens when one of the angle between the lines of initial Y is less than 90 degree.

An irrelevant question, how did made such a neat submission, perfectly cropped pages, whiter than pages, not a single smudge? DId you use a app line camscanner etc?