Why do you look more muscular in the light than in the dark?

Question

It look like I have more muscle in the light than in the dark, what gives?

Answer 1

yeah, you can see more of everything in the light, especially curvature and outline and muscles.

Answer 2

shadows

like what they used in 300 (no guys, none of it was real...)

Answer 3

shadows are funny dont worry about it