LIGHTING & RENDERING
As the story setting, there are 2 difference main lighting mood would use in this animation, which is day mood and night mood. The day mood which is use light yellow to light up the underground environment. The night mood which is use the cool color as lighting color, light blue as the main lighting color for the night mood lighting. These are the render images by using Mental ray and some color correction by using After Effect. There's a lot of color correction for night mood scenes.