Got things that deal with light?

If you have any links you'd like to add to this resource thread, by all means post in here with the link and I'll edit it into this opening post under the relevant sub-heading or I'll make a new one if needed.

This is all about us sharing tutorials we've found helpful or even tutorials that we have personally made to help other members of this guild.

Links please!

Books please!
Color and Light by James Gurney