In this class I worked with the Unreal editor, which is a game 3D game engine, which you can use to create your own customized maps for Unreal Tournament. You can even use this program for making 3D maps for other purposes and/or inserting your own 3D objects created in Maya or similar.
In the classes we were introduced to the editor by means of an online video tutorial, which was great because it was very easy to follow along. In the tutorial I learned to create my own map and inserting objects, and adding own textures to walls, ceilings and floors.

Below you will see screenshots of the map I made using the editor and at the bottom you can download the map source file.

Download map source file here. (ut3)