Not surprised this got attention fast. The tanned parts of her body are shaded in such a way that lends them a lot of visual texture. The shadow and detail of her right arm and underarm are also notable, there is a contrast of shadows between relative light sources. What impresses me the most is her thighs, specifically, the way the fat of her right leg hindquarters are clearly pressed against the edge of the pool and are spreading as they do in the real world. Equally significant her left thigh and calf are well shaded and pressed against each other exactly how they would in reality.