I definitely recommend this site - https://www.3drender.com/archives/index.htm There are some good tutorials and it is very helpful. My girlfriend bought me Jeremy Birn's book and though I haven't had a chance to read it yet, she has had a good read through it and says that it is excellent. Just make sure you get the second edition. https://www.amazon.com/Digital-Lighti...e=UTF8&s=books