obfatscation
A sneaky way to make someone look thinner than they actually are, usually involving angles and bad lighting
He took a photo in the dark. Now his belly looks like it's on vacation.
She used a flashlight to light up one side of her face. The other side is in the shadows. Who knows what's hiding there.
He leaned forward for the photo. Now his back looks like it's been run over by a truck.