When exporting a model to an .obj, all you get is the .obj and the .mtl files and the textures of the model are not included when the model is exported and are needed in order to view the model ...

Now go to the top left and click file>import>Wavefront (.obj) and then find your exported .obj model from roblox studio it should now look like this! If there is a camera fog or camera clipping press ...