The MAJIC system [] extends the Hydra concept to address these limitations by by giving the users in a session the illusion of sitting around in a round table projected on a special curved, transparent screen. Each collaborator is assigned an arc in the screen onto which his image is projected. Behind that arc is a camera and a microphone, which capture the image/audio transmitted to him, and a speaker, which plays his audio.
An overlaid background ensures that users do not see seams between the images of their collaborators.