So, lately I haven't had the most ideas relating to games that I have also had the desire to work on, so I started making a super basic engine in Java/lwjgl/slick. So far, I've added some basic tile lighting effects, because I might make some sort of a roguelike or a shooter or something with it, and I want the retro feel. Anyways, here's the tech demo for any interested in seeing how it's coming along: http://www.filedropper.com/junkengine_4

Basically, I have 3 integer arrays, one for storing each color brightness, and then, as lights are added, they add to those masks. It's a little more complex than that but that's the general premise.