Another tool that I used to love working with was 3D Gile[s] . It’s a light mapper, and you can use it to build 3D scenes and light them. So I started working on support to import 3D Gile[s] scenes. Even though I’m still working through bugs and this scene import is not 100% yet, here’s a screen shot of my progress so far:       Also did some minor optimizations of the engine itself. EDIT: [These minor optimizations were before the major optimizations I made by profiling]