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Large Format Rainbow Transmission Holograms are made using the system described above, with a horizontal slit master hologram recorded that captures only the horizontal information of the three dimensional model. These type of holograms can be made with either continuous wave or pulse lasers. If using a continuous wave laser, and exposing very large pieces of film (up to 2 metres x 1.1 metre) stability of both the 3D model and the film becomes a critical and difficult issue. However, the results can be spectacular. Image depths of 5-6 metres are possible. Even the (in focus) protrusion of the holographic image up to 600mm in front of the holographic film plane can be achieved.