I want to make the belly fat and ribs in my painting more three-dimensional

The head is a bit weird too, is it because of the proportions?
[img]https://ibb.co/RSP7pmH[/img]Reference pictures and my drawings
[img]https://ibb.co/1TMvWXR[/img]
[img]https://ibb.co/sCTZf5H[/img]
[img]https://ibb.co/x66ydSz[/img]

Just a heads up, those are links to ibb website pages. They can't be embedded. You need to put the link directly to the image file to use the img tag and have them embedded. These links would end with .png, .jpg, .gif or .webp. For example: https://i.ibb.co/PggR0Z1/MTXX-20241220-015036601.jpg

Which looks like this in the img tag:

Thanks! I tried it again