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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.
The FBX format of AutoDesk was originally developed by Kaydara in the 1990s for storing 2D or 3D content with motion data. Over the years, due to its 3D animation capabilities, it has evolved into a widely used format for 3D modeling applications such as Blender, 3D Studio Max, and others.
This format is used to contain 3D models, including vertices, faces, and other 3D geometric graphics, as well as animation data. The format is proprietary, but there is a publicly available API for development purposes. The file content can be either text or binary, and the Blender Foundation has worked to document the format.