I actually think that rendering the pelvis as much as the ribs would really help the piece. Right now, as my eyes glide over the painting, I’m drawn to the darkest places, which are the shadows that sit in the ilia. The iliac crests would also benefit from capturing more of that warm light being diffused from inside of the ribcage.
I’m a visual arts minor and from what I’ve learned having negative space isn’t a bad thing but sometimes too much empty space can impact your piece. I definitely think adding some sort of detail to the background would help. Keep it simple though as to not take away from the main subject
I really like what your going for here. I think one think that immediately stands out to me is that you don’t have much contrast in the ribs. The ribs obv contrast the glow/fire but the browns of the ribs themselves are very one tone. With such dramatic lighting I’d expect the rib bones to have more drastic changes in shadows across their surface. Also, the “neck” is very undefined. You’ve extended the glow into the neck area but don’t seem to have extended the bones into the neck which doesn’t-
i think the darkness of the background is fine and works, but all i’m missing is the setting. if you added some shadow, it could make it more look like a wall and a floor, or you could even make it reflect off the floor like a mirror, instead of it floating in space. i think adding anything too busy will take away from what you want to draw their eyes to