Oil on Masonite
Using a light source is detrimental to a painting. Having a specific light evident can create volume to the human eye. If you aim a light onto your subject you will see the highlight, mid-tones and shadows more clearly. If the subject is white or light against a dark background it is possible to achieve a glowing illumination. This illumination will also expose the temperature which stimulates the eye and tricks it into seeing a two dimensional object as a three dimensional object.
Some examples of this technique outside the egg are as follows.... Michael Deas's - Paramount Mark Ryden's - Ghost Girl Kinuko Craft's - Scent of Magic Donato Giancola's - Lady of Shalott