I hopped into that thread, ready to be an angsty stone mason and be all:
That's not brick you MFR! It might be garbage "cultured stone" where they grind up perfectly good stone, add a bunch of cement and form it in the shape of a proper stone veneer.

But other people had already done that and OP had already answered their own question, so I just took my torch and pitchfork and left.

Hah, i just read that and downloaded your normal red brick picture. Idk, it seemed like i could use this in the future. It's a pretty neat brick pic.

okay but what are perfectly smooth bricks called? I don't want ninjas or anything climbing up