The required maps have been prepared for two workflows Spec / Glossiness and Metal / Roughness
Materials prepared with Spec / Glossiness workflow
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3DS Max 2015 Corona + FBX
3DS Max 2015 Vray + FBX
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Seamless 4K
Normal Map = PNG
Other Maps = JPG
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Turn off Translucency if needed
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you can see video of this material here:
https://youtu.be/OY1dM9t-_6I