Sidelighting is light illuminating from a 90 degree angle to the subject. This gives an almost three dimensional effect to the subject being photographed. As seen below in this photo of The ESPN Club at Disney’s Boardwalk Resort, the sidelighting creates shadows in the restaurant’s exterior features showing depth in a two dimensional medium.
Sidelight hits The ESPN Club near Disney’s Boardwalk Resort giving a 3-D effect.
Nikon D70/18-200VR, 1/800s, f/8, 200 ISO, EV -0.3, 200mm Focal length