# OBJ > A widely supported, text-based 3D model format storing geometry and UV mapping, with materials in an MTL file. Also known as: Wavefront OBJ, .obj. Category: 360, 3D and output formats. OBJ (Wavefront Object) is a widely supported, text-based format for 3D geometry. It stores vertices, faces and texture (UV) coordinates; materials and texture references are stored in a companion MTL file. ## How PhotoRobot uses it PhotoRobot Controls exports 3D models as OBJ with MTL. PhotoRobot's format overview describes OBJ/MTL as widely supported across platforms and suited to sharing detailed models with materials, but larger than other 3D formats. ## See on photorobot.com - [Supported 3D model formats](https://www.photorobot.com/manuals/photorobot-supported-3d-model-formats) ## Related terms - [MTL](https://www.photorobot.com/glossary#mtl): Companion file to OBJ that describes materials, colours and texture maps. - [STL](https://www.photorobot.com/glossary/stl): A simple 3D format describing only surface geometry as triangles, standard for 3D printing. - [USDZ](https://www.photorobot.com/glossary/usdz): Pixar-developed packaged 3D format with native support on Apple devices, widely used for AR. - [3D model](https://www.photorobot.com/glossary/3d-model): A digital three-dimensional representation of a product, made of geometry and textures, viewable from any angle. ## Where this term appears on photorobot.com Mentioned on 3 pages. Most relevant: - [PhotoRobot Controls Supported 3D Model Formats](https://www.photorobot.com/manuals/photorobot-supported-3d-model-formats): Three.js); common in 3D printing communities where models are shared in STL format 3 - OBJ (Wavefront Object). - [3D Model Photography - Example Outputs by PhotoRobot](https://www.photorobot.com/output-type/3d-model): Generate virtual models in USDZ format (best for iOS / macOS AR), STL (with universal 3D printing support), or OBJ / MTL (for sharing detailed models with materials). - [AR Product Visualization Using 3D & AR Platforms](https://www.photorobot.com/blog/ar-product-visualization): Other formats include STL (universal support for 3D printing), and OBJ / MTL (wide support across platforms, ideal for sharing detailed models & materials).