The supported model formats include: {{(idx > 0 ? ", " : "") + format}}
AC format files are file formats used for 3D model data storage, mainly used by AC3D software.
AC files use plain text format to store data of 3D models. The file content includes information such as vertices, surfaces, and materials.
Each .ac file can contain multiple objects, each with its own vertex and face definitions. With this structured text format, .ac files can effectively describe complex 3D models.