From the anatomy charts it's clear the clavicle does extend that far, and I see the example photo on wikipedia's article on the clavicle shows bumps on the woman's shoulders similar to what SD likes to generate all the fucking time. And SD must have learned it from somewhere. So I'm convinced it can be visible in certain conditions, I just started wondering what those conditions are. Any shoulder knowers here? This may be a bit of a blind spot in my anatomy knowledge. Is it tied to specific poses? I suppose level of body fat and muscle development would play a part, and thus it would be most visible on skinny women. I've come to treat these bumps as a tell-tale for SD generated images but it's obviously not 100% reliable, but I also don't recall having seen it this prominently on real people.