This map is based on the light/dark world mechanic from Metroid Prime 2: Echoes, my favorite chapter from my collectively favorite game of all time, the Metroid Prime Trilogy. The idea is that the level has been split into two parallel dimensions - a light one and a dark one - hence the title. It's a KotH map where a team must own the point in both dimensions for their timer to start ticking down; ownership being split across dimensions will just pause the timer entirely.
To navigate between the dimensions, there are one-way vortexes throughout the map. While the map is rather small in 3D space, hopping back and forth between two worlds essentially turns the gameplay four-dimensional.
A KotH map split across two dimensions