Voxel, short for "Volume Pixel," is a system of physical pixels that move through real space, sense changes in the environment and visually respond to these changes. With detached messages, user control and programmability is vital. The Voxel interface allows users to program the system as they please. The interface for controlling this system of spatial media is composed of four palettes: Boundary, which sets the bounding area of the voxels. Sense, which tells the voxels what to look for within the boundary. Control Pallette, which adjusts settings to the system. Pixel Log, which records the behavior of each individual voxel into an archived database.