You can plug a MultiMap into a UVW Randomizer. Does it help?
Yes, but that kind of overcomplicates, a really easy process of 90-degree rotation of texture.
As you need to add UVWRandomize set the rotation from 90 to 90, instead of just adding quick 90
sorry tanakov, did you mean randomize map's rotation?
No, not really I know we have CoronaUVW Randomizer :)