Thanks for sending those through.
I’ve had a look at the file and it seems that the model may not have had its texture channels set up correctly.
As per the screenshot below, the model only has a single texture channel, which is attached to a texture file that doesn’t match any of the texture files you’re assigning to the model (Gray_texture.png) in your screenshot.
Assigning the normal, specular etc. maps to the model from within the subsymbol won’t work, as the model itself hasn’t been exported with those texture channels.
To fix this, you can open the model in your 3D software and attach your texture files to the model’s relevant texture channels, before re-exporting.
In regards to your texture files, height maps aren’t currently supported by Studio.
Lastly, in an emissive map black signifies areas of the surface which should not appear emissive.
Therefore, by having a totally black emissive map, you’re saying that nothing should appear to emit light, in which case this texture file can be omitted entirely.
Hope this helps, please let me know if you have any other questions.
All the best,