All the PBR materials, brushes, photos and 3D models which are offered for download on are provided under the Creative Commons CC0 1.0 Universal License.
The Creative Commons CC0 license gives you the freedom to use these assets...
… in your own creations of any kind for free.
… even in situations that require them to be redistributed as individual files (for example as part of an open source video game or tool).
… for commercial projects.
There is no requirement to give credit but it would of course be appreciated.
Giving credit
If you wish to give credit you can do so using this text:
Contains assets from, licensed under CC0 1.0 Universal.
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