Edge lighting comes from behind to touch the sides of the object, separating it from the background. Edge lighting occurs out doors when the sun is low in the sky and shining toward the viewer. Edge lighting is widely use in cinematic and environmental concept art.
The artwork below shows Star Lord, a character from Guardians of the Galaxy, hiding behind an huge structure. The sun was just above the top and to the side of the character, shining slightly toward the camera or viewers. A halo of warm light touches the side of the character.
More painting video tutorials you might be interested in
-Environmental concept trekking Tatra mountains
-Blizzard concept art digital painting tutorial
-Rapunzel environmental concept art tutorial
-Huion Tablet Meduim for $39.99
-Wacom Intuos5 Medium Pen Tablet
-SketchBook Pro 6
-PHOTOSHOP CC for $19.99/month