Everyone here has good suggestions. I do something to check to see how I did with the lay in. I make a copy of the original and draw an outline of the face, eyes mouth and nose. Then do the same to my drawing. Try to size them approximately the same and then compare. The outlines make it very easy to see how different my drawing is from the reference. Seeing what is wrong is the hardest part because sometimes everything is a little off. I find if I can get the lay in right, rendering is easy and usually successful.

First, thanks for being brave and posting here, especially when drawing from imagination. I don't know if I would be ready to do that myself. I am not an expert here at drawing the anatomy from reference or imagination, but here are my thoughts. I will also refer to your other post as well with the finished drawing. To begin with, your first sketch wasn't too bad for a basic sketch from imagination. You skipped hands and feet because I am guessing you are not confident with those yet. But as you refined the drawing, you pushed the pose further and further until you started to miss the perspective and the anatomy started to look off. My first bit of advice is to try and get in the pose you are trying to draw. I've even take a selfie to see how it looks when I am trying to do this. I think you will find you can't get into the pose you are trying to draw in the final picture. The body doesn't move that way. You could almost copy that first sketch however. As you refined your drawing, the right hip went way up while the legs basically stayed the same. The angle of the calf and heel is out of alignment with the thigh on the left and the whole leg out of alignment with the right glute. As you move up into the torso, there is an extreme twist and you need to make sure that twist is clearly shown. Right now I think the first sketch conveys that twist better than the final which would have an strong pinch on the side in order to twist that way. The difficulty here as described by Stan and other artists here is adding structure to your gesture without losing the gesture. I think your initial gesture had promise and then you tried to refine it and then some perspective and anatomy issues crept in. Try going back to that initial sketch and see if you can keep that gesture and refine the drawing from there. I'm new to this too however, so these are just observations. Other people may have different thoughts.

Great job. I do have a few observations. But first I should say that I think you are further along with your skills than I am so this is not a critique, just observations. I will focus on the female model drawing. I feel like you captured the gesture and proportions of your reference really well. There does appear to be a slight discrepancy along the right of the neck, but this is only noticeable because the rest of the figure is done so well. The main observation is that your half tones and shadows are very close together. For example, the right glute highlight and the left glute have the same tone but in the reference they are quite a bit different. The right arm also has very light tones and highlights going down the arm while the reference photo is darker. The affect on me as a viewer is that the lighting seems very bright and intense. There is also a really hard edge along the right glute between it and the leg. The only thing I will say regarding anatomy is that you took a lot of time to emphasize the anatomy in the torso but not in the leg so visually there is almost split between the detail of the upper and lower half of the drawing. The reference photo sort has this playing out too so I see how you got there. Again, this is not a critique because that may be exactly what you wanted. Overall, you did a great job and I am inspired to go do some more on my own. Thanks for sharing.

Looking back on the reference (I saw that you posted it earlier), I think you did a very good job matching it. Reading what Peter wrote is interesting because I feel like this is where artists can make decisions about the final piece. I was wondering what your thoughts are on what he wrote. I'm personally at the stage where doing as well as you did on this would make me super happy. But I was wondering if what peter had to say will influence what you do in the future. Thoughtful critiques are fascinating to read.

Hi Marco, I really like your stuff. So I was looking at your piece here and noticed that you are blocking out the face a little different than the loomis method. I think I am seeing lines blocking in the brow width and angle and then the back of the ear. What else are you doing?

Don't quote me, but I think you are looking at the Teres Major and the Teres minor

Beginner here, so I could be wrong. I think you are leaving too much of the original sphere. Especially on the side away from the viewer. I think you are trying to compensate with some contour line of the profile but it is too soon to do that. Be careful about how much you slice off Also watch the angle of the head. The last one looks pretty good, but the others look a little off. I believe the strength of the Loomis head is establishing the head angle from any angle. Focus on that in the beginning.

Gesture drawing is often introduced as a beginner exercise, but in truth it is quite difficult to do well. Keep working on it. You are getting a sense of the pose, but the drawings appear flat. Keep looking at some of the examples sent in by people here to get a sense what to do. You will start to see how the structure and form of the body can be simply expressed. Gesture drawing is something you can do on the first day of your art journey and in year 20. There is always something to learn. Unfortunately I am not good enough myself to offer specific critique on your work.

Complete beginner here, so please don't put too much weight on my opinion. I think you were going for disturbing H P Lovecraft-ish creatures here, and I think you succeeded there. They are very creepy looking. Good job. I don't know enough anatomy to have an informed opinion, but I have some impressions. In the first picture, the attachment area of the tentacle heads and the body could be smoother. Also the weight of figure falls on the slug body and you don't see it squished down flatter. I also feel it could come forward a bit to balance the weight of the ball out better. The second picture is nice. I think it is flying, so I feel like the wings could be spread out more as if in flight. But you may have been thinking of a different action, such as landing. The third picture is cool. I like the twist in the body which really shows off the worm like nature. I like the position of the back rear leg, but the front leg's position in the background is a little unclear. Given the shape of the one in the foreground, would you be able to see more of the one in the background? What if it was raised in a striking position. Please take whatever helps you from my reply and throw the rest away.