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I made this 20 PBR materials for a Unity test game.Use them as you like in a game engine like Unity or Unreal, or in a 3D Software like Blender, Maya, 3Ds Max. or other 3D Software. Hope you like them :)
https://www.graphix.no/free-pbr-materials/
*All in one file. Direct Download. No registration required. License: CC0