Okay, I'll admit, if I was designing a set for, say, Spongebob Squarepants I may deliberately choose the look of vacuform brick. It does have its place. And indeed it used to be the affordabe and sometimes more practical option over scenic brick. Scenic brick used to require the laborous individual pinning of each brick plus a half inch of heavy grout fill. The walls were a wild-wall nightmare.
But it says 'SET'. You cannot hide the look of cheapo vacuform brick. And Ive never seen a successful attempt at wrapping it around corners.
Nowadays we have a new method available. If you are lucky enough to have a good CNC company that you work with, I have fount that this is now the best way to go. You can quite quickly set up a 4x8 cad brick file, and you can even help the scenic painters by setting up the file with a slightly irregular grid and slightly roughened cut lines. The CNC machines can just take the grout lines down 3/16in, and its very efficient, quick and quite affordable.
The scenics can then just brush on a slurry of sandy slop and the bricks need minimal sculpting this way.
The walls remain relatively light for wilding.