Welcome aboard mate, looks like you already did a lot of work
remember to take it slow, let everything sink in and iterate a lot and don't one off the assignments, better to learn through repetition than to assume you already got everything with one try
A couple of things I notice so far
- a bit of warped perspective on the last piece (probably too close to VPs)
- Rendered face seems a bit flat on the eyes, nose and lips
- Lids lacking thickness and have an odd single dark value for the entire upper lid on the practice eyes, like upper lid makeup. when drawn from extreme angles the eye is looking a bit flat and the perspective of the pupil is mismatched (the pupil would be a flattened oval from the side seen through the cornea at an angle, it would be near the back, but not entirely in the back so as to disappear, also the cornea sticks out a bit and is not a continuation of the same circumference of the eyeball) also the contour of the lids would by thicker rather than thinner than the globe itself, they cover the globe. Another thing, to avoid having the eye look too tired/old/ectropion make sure you pay extra attention to the proportion of sclera vs iris showing. Its usually less sclera under the eye unless looking up or a drooping lower lid in various of these eyes. The pupil also, note that it changes size so in some of these when shown from extreme angles you tend to make the pupil smaller as if miotic.
- Definitely keep practicing those head constructions!
cheers!
