The goal of the HoloGraphics project at Bauhaus-University Weimar is to investigate possibilities of combining the advantages of conventional holograms - such as high visual quality and realism, support for all depth queues and for multiple observers at no computational cost, and space efficiency - with the advantages of today's computer graphics capabilities - such as interactivity, real-time rendering, simulation and animation, and stereoscopic and autostereoscopic presentation. Using stereoscopic or autostereoscopic displays to render 3D graphics registered to a hologram allows both holographic and graphical content to appear as three-dimensional within the same space. This article presents some or our project's findings