Before putting in the textures, I have decided to do some light tests for the scene. For number 1 - 3, I played with the intensity of the lights to see how it affects the overall scene. For 4 and 5, I have added an ambient light and played with the colours. In 4, I just had an orange ambient light but in 5, I added a ramp to the colour as I am aiming for a gradual gradient of purple to red lights which is not much of a success.
I am not sure at which stage I should be rendering the images. Is it before or after I plug in the ambient occlusion note?