Windows 3D Builder doesn't seem to export colours when exporting projects as a .obj file?

Max Parkin 0 Reputation points


I have made some 3D models in Windows 3D Builder and I have exported them as .obj files. The .mtl file saves as normal and is saved in the same location with the same name. When importing it into a stage lighting visualisation software, "Syncronorm Depence R3", the model imports, however, it shows up as a light grey colour and none of the colours assigned to the model in Windows 3D Builder seem to be exported. I have also tried importing the model into another software called "Blender" and the same thing happens. I have tried this with multiple projects and they are all doing the same thing.

Has anyone got any suggestions of how to fix this issue?

Many Thanks,

Kind Regards,


Windows 10
Windows 10
A Microsoft operating system that runs on personal computers and tablets.
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  1. Limitless Technology 41,906 Reputation points

    Hello there,

    When you export as an OBJ file, the colours are not stored within the model, only the separate pieces, the polygons that shape them, and which material covers which polygons. If you want to colour after exporting it you need an MTL (material) file named after the model's OBJ file. This holds all of the different materials and surface types.

    When you export an OBJ from 3DBuilder it will also save an MTL file with it (if you don't just click cancel, anyway.) You just need to import this MTL file and assign it to the mesh.

    Hope this resolves your Query !!

    --If the reply is helpful, please Upvote and Accept it as an answer–

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  2. Max Parkin 0 Reputation points

    Hi, thank you for your reply. I have already done this, and the .obj and .mtl file have the same name and are in the same location. I'm not sure why it's still not exporting the colours?

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