Please keep in mind that this method only works for the Quest version of the game, and it doesn't work for the PSVR and PC version. In order to do this glitch you have to have teleportation as your way of movement. Then if you want to teleport through any wall you need to go to the wall that you want to clip trough, hold the teleport button and bring the blue teleport circle against the wall. After that, move your hand slowly away from the wall while still holding the teleport button until you see the blue teleport circle jolt forwards closer to the wall. Then release the teleport button, and if you did everything correctly, you should be able to walk in real life through the wall. I hope this explanation was clear. If not, then watch this video: