There are quite a lot of results for “concrete texture” if you search here on the site- for example:
I didn’t take the time to grab more, but there’s a ton of existing answers in those result that may be helpful 
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There are quite a lot of results for “concrete texture” if you search here on the site- for example:
I didn’t take the time to grab more, but there’s a ton of existing answers in those result that may be helpful