Zootopia’s fur: https://www.youtube.com/watch?v=zaqmn55w4IA
When we apply texture to a sphere, the seams of the texture look horrible because there is no match between opposite sides of the texture. This problem has been solved by special kind of seamless, procedural textures described here:
The seamless textures are important for many CAD users, but CAD vendors have been ignoring them for decades.
How Unreal Engine renders a frame:
part 1: https://interplayoflight.wordpress.com/2017/10/25/how-unreal-renders-a-frame/
part 2: https://interplayoflight.wordpress.com/2017/10/25/how-unreal-renders-a-frame-part-2/
part 3: https://interplayoflight.wordpress.com/2017/10/25/how-unreal-renders-a-frame-part-3/
iridescent light simulations: https://www.youtube.com/watch?v=SauCsNkGr-E