Hello Waypoint, last night, I watched a video showing gameplay of the improved Forge Mode being added to Halo 4. New improvements added to Halo 4’s Forge mode are being able to pick up objects easier, the ability to “lock” an object so you can keep an object in its place without pressing a button and messing the whole thing up. Other improvements are the new tool called the "magnet’ which allows you to even out objects to make more smooth and accurate (in Halo: Reach’s Forge, if you moved the analog stick, it would mess up an entire bridge). You can also change the players accuracy by for example, giving the player more speed or making him/her invulnerable. Click here to watch Halo 4 forge gameplay.
It’s pretty old news by now. But the features were amazing nonetheless. If you want more info from RTX, you can check out my thread!