Help! render to texture in 3DS max not working

Hi, I'm trying to import this mesh into Unity, The map type seems to be a Multi/Sub-Object it looks like this.



I tried to normally just export the file as a .FBX but it exports it as a grey mesh instead of it being textured, So I googled it and someone said I need to render it to a texture. When I followed the steps, This was my result.



Which doesn't look right at all.. Here are my Render to Texture settings.



I've spent about 8 hours now trying to figure this out. Any help would be very appreciated. Thanks!

 

Hmm it should be correct, but I am noticing that you are using 15 submaterials (15 UV sets) while you are using an automatic unwrap to channel 3. Can you move that to channel 16?

Bit tough to diagnose out of screenshot alone though. I have 3DS Max installed, if you want, contact me via PM, perhaps I can help you out.