In ShurikenVR, the levels are meant to be played in a specific area, as the environment outside of that area is not properly populated, as seen below.
![](https://boonlightgames.com/wp-content/uploads/2021/09/image-1-1024x631.png)
So to prevent the player from leaving the designated play area, boundaries are set at the edges of it. This is done by placing a box collider which will only collide with player and the teleportation kunai (using the collision matrix in Physics settings). I’ve also added a fancy shader that will only appear (locally) when the player gets close or is hit by the teleportation kunai.