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The OBJ file format is a file format used to describe three-dimensional objects. It consists of a series of vertices, faces, and texture coordinates, which can describe the shape, texture, and other properties of an object. The OBJ file format is commonly used in 3D modeling and computer-aided design (CAD) software, where three-dimensional models can be exported as OBJ files for further processing and manufacturing. The OBJ file format is simple and easy to use, making it widely used in various fields. The OBJ file format also supports multiple color spaces, including sRGB, Adobe RGB, and grayscale. OBJ files can be created and edited using many different applications, including Blender, Maya, and 3ds Max. In summary, the OBJ file format is a widely used file format in 3D modeling and computer-aided design (CAD) software, which can describe the shape, texture, and other properties of an object.

The STL file format is a file format used to describe three-dimensional objects. It consists of a series of triangular faces, each face composed of three vertices and a normal vector. It is commonly used in 3D printing and computer-aided design (CAD) software, where three-dimensional models can be exported as STL files for further processing and manufacturing. The STL file format is simple and easy to use, making it widely used in various fields.