Object Source Lighting
Painting the glow a light source in the scene would cast, so a plasma coil or a torch appears to light the model itself.
also known as: OSL · object source lighting
The light source is painted, so everything it would touch has to be painted too: the hand holding the torch, the underside of the chin, the inside of the cloak. The rule that makes it read is falloff — the surface nearest the source is nearly the colour of the source, and the effect dies within a few millimetres. Painted evenly across a whole model it stops looking like light and starts looking like a green model.