Basically, add an option for an object to appear when the variable is activated. this could possibly be triggered by using "absolute" : true on a rotation that uses the 'visibility' animationType, since it would otherwise be unused.

The idea is that this headlight beam will activate after the headlight door is opened.

				"objectName" : "&HeadLight_FFFFFF_FFFFF_100",
				"animations": [
					{
						"animationType": "visibility",
						"centerPoint" : [0, 0, 0],
						"axis" : [0, 0, 0],
						"variable" : "headlight",
						"absolute": true,
						"duration": 0,
						"forwardsDelay": 5,
						"reverseDelay": 0
					}
				]```

You can just set clampMin/Max to 1