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OBJ (or .OBJ) is a geometry definition file format first developed by Wavefront Technologies for its Advanced Visualizer animation package. The file format is open and has been adopted by other 3D graphics application vendors.
The OBJ file format and 3D printing go hand in hand. Find out all you need about the OBJ file format for CAD and 3D printing.
An OBJ file is a standard 3D image format that can be exported and opened by various 3D image editing programs. It contains a three-dimensional object, including 3D coordinates, texture maps, polygonal faces, and other object information.
The OBJ file format facilitates the user to tessellate a 3D model surface using simple or complex geometric shapes. For surface geometry encoding of a model, a file stores the vertices and normal to each polygon.
OBJ files are a standardized type of file used to store 3D geometry data. They act as a blueprint that 3D software uses to recreate 3D structures with ease. OBJ files make it possible to store every vertex, face, and texture of a design.
The OBJ file format stands as one of the most crucial file formats in 3D printing and 3D graphics applications. It serves as a preferred format for multi-color 3D printing and finds extensive use as a neutral exchange format for non-animated 3D models.
In this comprehensive guide, we will dive into the OBJ file format, highlight the features, address common questions related to 3D printing, and provide valuable resources for working with OBJ files.
What Is an OBJ File and How Do You Use It? OBJ files are standard 3D formats that can be exported and imported by various 3D design programs. The OBJ file format was created in 1992 by Wavefront Technologies.
At its core, an OBJ file is a standard 3D image format that contains three-dimensional coordinates, texture maps, and other object data. The name “OBJ” essentially stems from the file extension .obj used when saving the file. It is a simple, open format, making it compatible across various software platforms and tools.
Obj files are used to transfer the 3D object’s geometry information between software programs, such as the vertices position, vertex normal, UV position of texture coordinates, polygon lines and points, free-form curves, etc. This format is most preferred for multi-color 3D printing.