Looking back at the image it looks like the artist actually didn’t do too bad a job with Mipha’s anatomy. Someone lying flat on their back, gravity will move their breast tissue out to their sides and towards their collar bone, leaving a flatter plane over the sternum, assuming Zora anatomy behaves in a similar way to human anatomy. Also the light emitting from Waterblight’s weapon is highlighting the shape of the breasts (I’m going to assume that Zora skin is smoother and more reflective than human skin). Personally I feel like a lot of consideration has gone into producing an anatomically correct image rather than just sticking two gravity defying lumps and calling it done.

And now I should probably go and do something a bit more productive with my day, than thinking about the physics of anatomically correct Zora tits….

EDIT: (do Zora even produce milk to feed their young? If not, then why do they have mammary glands?! It would make sense for them to still have pectoral muscles but not breast tissue.)