Nice theme! And I love the set together.

Hi @Alexander Nice study! I think you succeeded well with the proportions! It would be nice if you add some dark halftones to soften transitions (in other words: giving more variation to the core shadow), if your goal is to create the illusion of form turning. I hope this was helpful :)

The general problem that i see is that you're not modelling enough on the light and you're not think about your values as a whole. I can see you did a good job on the 2 value stage because the thumbnail looks good. The problem is when I zoom in everything in the light looks flat. I would like to you to make a few value studies of this portrait. Try to simplify everything in 5 values (3 light 2 dark). Look for the halftones in the light closer to the shadow because they are the ones that describe better the turning of the form. Also have always in the back of your head the value hierarchy and always question yourself on how can you describe the forms of the nose, mouth eyes...with value. Also try filling your background with a darker value first. You'll help you judge better the values inside the head. About your concerns on proportions, well...the Loomis head is an idealized version of a head. In most cases you're gonna find deviations. The proportions you used are within the human realm of possibilities, problem is that the model has a wider head than average. Whenever you're doing a portrait you have to adapt the loomis proportions to get more likeness. You can also decide to make an idealized head of that person which is fine also, but make that choice consciously. Keep drawing and Best regards.

I'm glad to hear that, and I'm happy to have helped.

Hi Alexander,  Overall these are all great! Strong gesture and the figures are balanced!   I noticed some things that might help:   GESTURE   I think you would appreciate watching Mike Mattesi´s 3 videos on the Force method ( https://prokolab.com/lesson/improving-line-quality-and-rhythm-force-series-part-1/discussions ) I like to think of how flow is being pushed from side to side like a stream of water. The basic gesture (like stan does in 30 sec poses) is very strong in your drawings, and I think that is what brings much of their success. But that gesture could be helped even more by the extra lines you add in a longer pose. Watch out for symmetry since it can kill the flow.   SHADING I would suggest giving more variety to the core shadows. Does the form have a soft turn? Is it large?:  Make a wide soft core shadow. Does the form have a sharp turn? Is it a smaller form?: Make a thinner sharper core shadow. Try to improve the shape design by varying their length and bend. Watch out for making a bunch of similar c curves. Counter straight lines with curved ones and long lines with short ones You could also push the core shadow slightly to help the gesture   Hope this helps :)

@Alexander Very good drawing and pretty cool technique! If I were doing this, I don't think I would spend more time with light tones. Honestly, I really like this value range you worked with, I guess a lower contrast gives the drawing sort of a "lightness" and "sketchness" quality that I personally enjoy. And I wouldn't correct the things you mentioned about the anatomy, it looks fine to me. However I think I'd soften those little dark dots on the background, I think they've become kind of a distracting texture... but I'm not familiar with the technique you used, so I'm not sure you might have had any control with that. Anyway, looks like a good job overall!

@Alexander Just keep practicing and moving on with the course! You're doing very good up to now. As you move on, keep watching out for proportions.