Layer 6 problem

[Psychotronic]

You know, one solution I've found is to put the fake wall in the background instead of the foreground. It takes a little bit more work, because the game won't add the 3d fringe automatically, but it hides the secrets even more effectively than layer 6 will. And then you can add proper fringe by copying stuff from layers 1 through 3 and pasting it in layers 4 and 5.