The mobile phone will be moving throughout the scene, bumping into props and casting a glow on the environment. It's also important to me that as the screen is on, it should have a realistic interface. The idea that someone is calling the phone can only be realised if the screen lights up an image as well emits light. This has been a cause of some head scratching, but after thinking through the idea logically, and acquainting myself with the shader shop in more detail, I seem to have managed to produce a decent effect.
I am also attempting to produce God rays/Cathedral rays to light the scene from above. This is an early test render comped onto the back plate. This is NOT the final grade or composite, I was just interested to see how the lights from the dummy geometry would look with the back plate. I think the effect is working relatively well, perhaps a little fast, and the geometry certainly needs cleaning up a bit. I'm also not liking the rays through the side portholes. Perhaps a simple glow would be more effective here. It'll be interesting to see how the light rays are effected by the movement of the phone through the scene.