The objective of this project is to develop full-body and hand gesture based user interaction within immersive environments and on large displays using cameras. Think Minority Report, yet with markerless tracking. The idea is to track the users motion to determine what type of interaction he/she expects from the software/immersive environments running on these large displays. The area of camera based tracking is a widely researched one and there are many algorithms/research papers, yet surprisingly few usable and functional applications. The project uses fast IR cameras to track the users hands and head in 3D. The inputs are fed to software driving large displays to let the users interact with the display while standing in front of the screens, and within the immersive environment. The system utilizes stereo-vision to track users' head and hand positions and vectors within a 3D space.