> I know, man. Imagine making a dome. Inside the dome, it is completely dark because it is closed off. Imagine to possibilities!
It’s still not confirmed that that will happen (going completely dark, I mean). I’ve asked several times but never got an answer.
I imagine it would, logically. However, they may have something in place to prevent a completely dark room, due to not having enough light objects available to properly light a map. So they may have some logic in place to set the room to a default lighting when dealing with enclosed objects. I’d be sad if that’s true, but it may just be the case.
If not, then I’ll be even more stoked than I already am. The lighting alone is going to create some AMAZING options for map making, which I just recently got back into a few months ago when I started my first full-fledged Forge map in Reach. It’s done now, and I’m totally proud of it and think it’s amazing. However, the lighting is terrible (even though it’s built in the big gray room in Forge World), and certain pieces turn weird colours due to the lighting engine in Reach. I can only imagine what this map would look like in Halo 4; it’d have so many amazing shadows and it would really bring the map from looking like a lego-style build to a real, legit looking Halo map.
In fact, if constructed properly, Forge maps in Halo 4 could look extremely similar to staff-created maps. With the exception of moving objects, a lot more unique pieces and light sources, and more diverse textures of course; 343i can pretty much do anything they want, with their only limitations being the hardware constraints. But what I mean is that maps will look professionally made, as long as they’re constructed as such. They won’t look like “thrown together” pieces and such.
I’m just hoping for more than 2 light sources, and hoping that with the new lighting engine, said light sources will do more than just make a few Forge pieces reflect a bit of blue or red or whatever on the surface; I’m hoping they’ll cast shadows, and actually “light up” areas. Maybe some options as to how much light they give off, and being able to pick from more than 3 or 4 colours.
Also, some Forge pieces that emit tiny bits of light/glow; for example, a futuristic lamp-post like you might see on the “Headlong” or “Terminal” maps. Or maybe little lamps/light fixtures you would see on the walls of the “Reflection” map, etc. Things that don’t hage huge, processing-crunching light sources, but that emit a bit of light and provide a bit of visual distinction. I’d love that 
Lastly: elevators, like you see in the “Sword Base” or “Construct” maps. At least 2 or 3 different kinds/heights, maybe.
Here’s to hoping! Regardless, it looks amazing just the little bit we’ve seen so far, that’s for sure!