I was interested if there exist any texture packs / websites / databases, containing textures, which we could use in our assets? I am interested into these ones, which I could redistribute them by including into my asset before submitting into Asset Store, to make sure that I am not violating any copyrights by doing so…
I’m not aware of many sites that will allow you to redistribute textures (certainly not cgtextures or any of the other commonly used sites). You can do a Google Images for genuinely public domain textures, or else best create your own.