Those are fine, your issues are coming from whatever 3D software you decided to download (would have been wiser to tell us here which one). And keep whatever objects you downloaded from Sketchfab. It's always good to read forums around as someone always had a similar issue on close to any subject and the web is often more a marvelous place to find answers than ask questions. Google search 'how to import an obj' and you'll find your answers.īecause OBJ is a format common to all 3D apps and softs, you'll usually find it in an 'import' menu rather than an 'open' menu. It's a bit like opening a 'MyMovie.MP4' with a 'MyMovie.SRT' for subtitles in the same folder : you open the MP4 and the SRT is loaded automatically by your player.

If you import for example a 'MyObject.obj', just keep the 'MyObject.mtl' in the same folder and all will be fine.

Values of ambient, diffuse, specular, transparency, emission and so on. MTL is your OBJ's 'companion file' containing the surface shading (material) properties for your 3D object. OBJ holds the mesh information : position of each vertex, UV mapping (UV = XY axis for 2D textures), faces' normals, vertex color, etc. 'The licensor cannot revoke these freedoms as long as you follow the license you obviously need to spend some of your time learning a few basics ) Read around what's an obj and an mtl before trying to blindly open files without having an idea of what their extension means : If the model author changes the license after you download it, that's ok, but the the license you received it under will always prevail. No Derivatives and ShareAlike are mutually exclusive.

CC0 - Public Domain: No Rights Reserved.

CC BY-SA - ShareAlike: depending on the NC choices, others may share, edit, and use the model, but derivative work must be shared under the same license.

CC BY-ND - NoDerivatives: others may use and share the model, but it cannot be altered.

CC BY-NC - NonCommercial: others cannot use your model commercially.

CC BY - Attribution: depending on the NC, ND, and SA choices, others may share, edit, and use the model, but they must give you credit for the original work.

If you're unsure how you can use a downloadable 3D model, review the details of the corresponding Creative Commons license:

LicensesĮach downloadable model is offered under a Creative Commons license, which means if you download a free 3D model and you want to use it or build upon it, you need to credit the creator (except for CC0). If you'd like to request a user reconsider offering their model for download, feel free to politely comment on their model page, or, if they are a Pro (or above) user, you can request so via the Contact button on their profile.

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