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In some visualization systems, the data and computational resources are distributed globally and users need to interact with these resources easily and efficiently. Real-time rendering for massive datasets is a computation intensive task. one solution is to distributes the rendering tasks over a set of computation units to achieve high rendering performance. This paper presents a recursive sort-first partitioning algorithm named Dynamic Pixel Bucket Partition (DPBP) for parallel rendering alone with their implementation and performance in a distributed rendering environment. This algorithm distributes rendering work loads evenly to individual rendering units to achieve fast, high quality rendering of massive data. Test results in a multi-cluster environment demonstrate the practicality of this rendering algorithm.