Worked on the CesiumGS/cesium repository to enhance 3D rendering stability and model compatibility. Addressed flickering issues in Gaussian splats by ensuring vertex arrays were properly defined before texture generation and by caching key rendering resources, improving reliability in complex scenes. Extended glTF model support by implementing compatibility for the EXT_mesh_primitive_restart extension, enabling broader interoperability for 3D assets. Resolved model sorting and PNTS crash issues to further stabilize rendering workflows. Updated project documentation, including CHANGES.md and CONTRIBUTORS.md, to reflect technical changes and acknowledge new contributors. Utilized JavaScript and Markdown, focusing on 3D graphics and rendering optimization throughout the process.