Update on Next Tutorial

I wanted to give everyone an update on the next tutorial, since it's been a while.

As you can see in the pictures, there's multiple lights at once, specular maps (look at the difference between the land and ocean), and spot lights. This code also includes directional lighting, but I think it didn't make the pictures.

I'm sorry to let this take so long. Life has been busy, but it should be less busy relatively soon.

The other problem has been trying to break this tutorial up into manageable chunks. I may have to switch to making it into an annotated example project instead of a tutorial (which might be better overall, and would let me make more content). Feel free to leave comments if you have any feelings about this (and I know some people have asked for that sort of change in the past).