Autostereoscopic displays are a subject of recent research efforts in Computer Graphics. Such displays have to be fed graphics information in order to produce spatial images. This information is typically 4D radiance data called a light field. Traditionally light-field models were based on the two-plane parameterization. In this paper, however, we present a light-field representation that is based on the direction-and-point parameterization. This parameterization has certain uniformity properties that produce better rendering results. We describe the files and data structures needed to store the representation, and we introduce a rendering algorithm that takes advantage of the uniformity properties of the direction-and-point parameterization. Our algorithm runs in real time and renders light-field models that look like their geometric counterparts