Outside application and or plugin, probably best since some time has past to jot this issue down for a later date to review and look into for next time and just go ahead and manually do it, this is a good example of why planning ahead is important. Blender might help with this idk about blender to much though & jumping…
Have you looked at Adobe's site? Tons of great resources to get you going: https://substance3d.adobe.com/tutorials?software=Substance%203D%20Designer As just one example: https://substance3d.adobe.com/tutorials/courses/creating-a-tudor-house-wall
There was an example posted somewhere within that Twitter thread- I can't find it, though. They showed the version the generator recreated as something akin to a messed up VHS tape- huge blocks of random colors and structural corruption
if you use default z brush plane primitive and your target texture is 1x2 you can use 2 and -2 in Array for x axis (using append new button) and 2 and -4 for y axis. Also duplicate the original plane before this overlay scale up. You would be able to use it as a crop factor after you "grab" it , and then texture > crop and…