Hello Robert. Materials and the way light interact with them is what gives the render its quality, aesthetic, realism, etc. So it makes sense to spend a lot of time in them. Getting your brain to get the hang of the mess of noodles that can come about materials can take time and specially patience and it can get frustrating. But once you get the hang of them you wont be able to get enough of them, you'll spend so much time perfecting your materials, trying to get that reflection just right, that smudge just right, hours and hours will go by on the tiniest of things.Â