There's a machinima mode in custom games that works perfectly for screenshots, just go into custom games, settings, general settings and down at the bottom you can turn on Machinima Mode, after that, press X and hold down on the D-Pad and it'll take you into camera mode to freely move about the map and capturing pictures, X-Down D-Pad lowers your weapon for some sweet ass Spartan Shots <3 Hope this helped and hope this improves the pictures for the maps advertisement.

 

Alright, I checked out what you had so far and I like the gist of it.

For feedback, I think you could refine the outer ice canyon walls so that they blend better and don't look so repeating. Also fill up any "holes" behind the walls that you can see in your intro camera. A flat or two should do the trick. You can cut down on the outside trees and focus more on putting them on the inside of the canyon. I recommend putting rocks in the canyon too, like on the map Ice Fields. The banshee platform needs some work IMO. Elaborate on it if you could. Maybe make it symmetrical.

Also I liked seeing my prefab in there; nice. My phased glass there might have gotten messed up, maybe phase it down slightly. Good job.