Is there a simple way to fix repeating patterns?

[davidv47691666]

I know it should be possible with 2 different seeds for the material and opposite masks, but I don't know how to do that. I tried but it was quite convoluted and you could see the "gaps" between the two different masks.

[davescm]

I often cover repeating patterns with a bit of noise/grunge on a new layer with no tiling. It doesn't take a lot to draw the eye away from the repeat and can make the surface look more natural.

Dave