>>83485530>>83496799There's a large back muscle that can be seen when you raise your arm that isn't drawn that you can see in the redline. Depending on the angle, position of the arm and size of the shoulder muscles, you can also see a bit of the shoulder on the other side at times. This manifests as a bump between the area where the back muscle disappears behind the upperarm. The upperarm slides in front of the back muscle and is connected to the torso at the armpit. The armpit is made up of two masses that are connected to the underside of the upperarm and to the torso, and there's a main wrinkle where these two masses intersect. I gave this area a little bit of cel shading so you can see the form better. That whole area is complex so I suggest looking at a lot of good references.
When you lift your arm above about 70 degrees (where 0 degrees is flat against your torso and 180 degrees is above your head), your shoulder begins to lift with it. This is subtle until it is lifted to 90 degrees above, where the clavicle and shoulder movement is apparent. The canvas right shoulder looks a little strange because it is not lifting and is staying in line with the other shoulder, making it look flat, especially because the arm is in the right place. When the clavicle lifts up with the shoulders, muscles from the shoulder obscure parts of the clavicle. These muscles also connect to the pecs, which are connected to the breasts.
The neck muscle circled connects from behind the ear to where is circled on the clavicle. As you can see in the example, the mass of the neck connects to the torso at an angle, even when holding your neck "straight". There is an elastic strip of skin that connects the clavicle to the neck that you can feel if you touch it. So, the front of the neck should be a straight line angled toward the back until the area where the strip of skin starts, then the line should bend towards the clavicle. Because of this, you should be able to see the neck muscle that connects to the clavicle on the other side of the neck as well.
The area where the ribcage meets the midsection on canvas right looks a bit flat because the form of the ribcage is lost. There should be a sharp angle where the ribs meet the midsection muscle, and you can see this on every body type except landwhales. The shading there is also off for the ribcage, and since you see more of the side of her body at that angle that should be apparent in the shading (see example).
Unless you're working in hentai sizes, you generally shouldn't be able to see the butt from the front, even at a 3/4 angle (except for between the legs). Because of how the thighs and butt muscles connect, the part of the thigh that connects to the hips will obscure the butt. The shape in the example is a really nice "cheat" pattern because it makes drawing the hips a lot easier, and is done correctly on the canvas left leg. Obviously, this shape will be more or less pronounced considering how much muscle/fat they have on their thighs. The bottom of her swimsuit looks weird but is an easy fix after you get the hip area correct.
Nitpicks: Canvas left breast is a little too small, and the shape will always look better if you make the bottom of the breast curve over the shape of the ribcage. Belly button placement is a little off. The canvas right arm is a little too long. Canvas right leg should be bent forward a small amount otherwise her stance will be off balance, try to think about where your character's center of gravity is and place their feet accordingly.
Everything I just traced or didn't line is perfect. I love the face and hair and Yuu and the perspective looks good. Hope this was helpful at all.
