31. Drag the ToggleIsTrigger script onto the Plane object.
32. Click Play.
33. Select the Plane, then click in the Game window to change focus.
34. Watch its Is Trigger parameter in the Inspector.
35. Press the t key to toggle the Is Trigger off and on. Try driving forward and backward
through the invisible plane.
You should be able to drive through from both sides when Is Trigger is turned on, but only from the back side if Is
Trigger is off.
So far, you have used the IsTrigger parameter for one of its side effects—to turn off physical collision. Its intended
purpose is to allow an object, such as the First Person Controller, to trigger an event or action by passing into or out of
a (frequently) non-rendered object containing a collider.