This paper introduces a new model for 3D graphics compression, recently adopted by MPEG community in the Part 25 of the MPEG-4 standard. The model makes possible to use MPEG-4 compression on top of a third party XML description, facilitating its deployment. Now, the compression and transmission layer, ensured by MPEG-4, is better integrated with the production to consumption chain. The paper reports and analyzes the compression results when using the proposed model