Property overrides

Property overrides can be used to override a property for all instances of an entity, even ones you haven't made. This can be useful for bricks that alter existing functionality (like turning lights on and off), or for overriding all instances of a property.

Property overrides are very powerful; by specifying a specific light entity, you can turn only that one off, or by specifying a sub-entity inside that light's template, you can turn all lights of that kind in the scene off.

Here's a diagram of how this works: