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From the Config drop-down menu, select glTF PBR Metal Roughness.Export the glTF file from Substance Painter If that's the case, then export your model from Maya again and make sure that the mesh is a single object and has only a single texture assigned to it.
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The mesh had more than one texture assigned to it.The mesh wasn't combined into a single object.If you see more than one texture set, then one of the following was wrong when the mesh was exported from Maya: When you import the OBJ file into Substance Painter, you should see only one texture set: In the Texture set settings panel, click Bake Mesh Maps. Add this channel if your model has components that will be transparent. Add this channel if your model has components that will emit light. In the Texture set settings panel, click the + button to add channels: If you see more than one texture set, then see Multiple texture sets. Verify that you correctly exported your mesh by checking that there's only one texture set in the Texture set list panel. Select the OBJ file that you exported from Maya, and then click Open.In the New project dialog, click Select to choose a mesh.Create a new Substance Painter project by clicking File > New.Import and prepare the OBJ file in Substance Painter From the Files of type drop-down menu, select OBJexport.Enter a file name and the location where the file should be saved.
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