Thanks! I used orthographic camera for the outside shots and perspective camera for the indoor shots. I used 3d text for the interactions and used a separate camera for GUI. I'd recommend using 3-color gradient lighting and adjusting the color correction curves. The lighting is also pretty important for the color gradient system. I ended up using just one directional light, everything was in one scene. I'd suggest changing the color gradient and then the lighting, rinse and repeat until you're satisfied. :)