25 min nude figure (8.04)

This looks really good! The shading is really well done, but the legs don't look proportionate with the head and torso. Next time, try assigning plates on the page where the top & bottom of the figure will be, & then use the head's measurement to determine the mid point & how tall the person is. If you're interested, I can send you some pictures of drawings I've done demonstrating this!

L'ombrage est super ! Par contre les jambes sont un peu courte par rapport au reste du corps, n'hésite pas à les allonger un peu, quitte à ce que cela arrive au bas de ta page :D

I think you kind of added some foreshortening, that is by my memory not really present in the reference. Namely the head is quite big, and the legs and feet are rather small. Thing is, it is less obvious, because it emphasizes a bit a natural tendency of the physique of the model, so it could also be a voluntary exaggeration.

With the shading, I found it more effective to emphasize the terminator, where light and shadow areas meet and form a distinctive line.

Also, well, finding the best direction for the hatching is still a dark art for me, too. When in doubt, it often works best for me to keep a singular diagonal direction throughout the whole figure, and only to focus on the value.

Changing the direction of the hatching is always a strong statement, and can lead to the eye reading stuff into it, that it isn't supposed to. Like in your picture, you actually model the volume quite well with the shape of the shaded areas, but then the hatching introduces flat zones, because from the contrast with other hatched zones the eye starts to read the hatching as depiction of a surface instead of purely a value.

Ideally, having the hatching follow contour lines would be a neat trick, but pulling that off without introducing a total mess is still a bit of a dream.