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CloseMakes the collision detection system ignore all collisions between any collider in layer1 and any collider in layer2.
Note that IgnoreLayerCollision will reset the trigger state of affected colliders, so you might receive OnTriggerExit and OnTriggerEnter messages in response to calling this.
You can set the default values for your project for any layer combinations in the Physics inspector.
See Also: Physics.GetIgnoreLayerCollision,Physics.IgnoreCollision.