Roman Brick material fully commented Substance graph and its SBSAR file to study and to use as per the License. It's based on PBR workflow and consists of all the required maps.
Commercial use of the textures is permitted and is non-transferable. However, the textures must not be redistributed or resold in texture or asset packs and must be embedded components of electronic games and interactive media such as a video game, movie, VR experience, or similar product.
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If you have any question or problem, message me here on CGTrader or my mail: mamdosssss@gmail.comI will be certainly glad to