1) Place down 1-3 Mirror Axis
2) Place down Mmushroom, grate corner or light bar corner block in a valid place that allows all permutations to be seen easily
3) Notice some Mushrooms have been incorrectly rotated onto their side for example
4) Repeat for different rotations of M3) Notice some mushroom, the result will change each time.grate corner or light bar corner have been incorrectly rotated onto their side for example