As a visual sphere of perception, this arises as a function of not-phong, which suddenly becomes that which could be called phong, by an organic process of conditioned time manifestation.
Through complicated circuitry, not-phong reflects carfully prepared oscillations, giving rise to highly detailed patterns of light waves, the trunk of their fractal becoming form perceived as what could be called phong.
Ceasing it's source of emission, the illusory form of phong gradually passes, returning to the timeless void which could not be called phong.