Dygra is a real-time non-euclidean ray-tracer. Dygra is meant to be used with Azathoth, a custom built level editor - https://github.com/rameshvarun/azathoth
Some Basic Levels - http://youtu.be/ywZNsu-tZo0
Demo with Commentary - http://youtu.be/YvU-srHhQxw