El Mac is a graffiti and photorealistic artist based out of LA. He has done installations from Miami Art Basel to the Adobe HQ (above). I like the ripples/waves he uses for shading and contour, which can also be seen in his sketches (bottom). Interestingly, El Mac names an artist I featured here as a source of inspiration.
Retna, another LA-based artist, did the typography in the installations with the boy and the man with the glasses.