Take a look at a pack of high-quality materials for Unity projects.
Take a look at a pack for Unity that contains 140 high-quality materials: 50 unique, 4 customizable and tons of color variations.
First of all, the materials come in low resolution, but you can set a high resolution by following the steps described in the text document “READ ME FIRST”.
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This package will receive updates with new materials every month!
Extremely lightweight: weighing only a few kb (with no quality loss).
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The materials are in Substance format (compatible with all Unity versions).
You can set the resolution of your choice!
VcDesign
What is more, you can get 25 materials from this set for free here to decide whether you should go for the full pack.