1. A system, comprising: a first three-dimensional (3D) collaboration system comprising: a first display configured to project a stereo 3D scene; and a first processing subsystem configured to: receive processed captured images of a first subject and/or a viewpoint of a second user of a first graphics object from a second 3D collaboration system, and render the processed captured images of the first subject and/or the first graphics object in the stereo 3D scene one or more first tracking sensors configured to track a six degree of freedom viewpoint of a first user associated with the first 3D collaboration system, wherein the first processing subsystem is configured to adjust a projection of the rendered processed captured images of the first subject and/or a first graphics object such that the projection substantially matches a viewpoint of the first user.