Conditional Display of Polygons

It would be a creative boost to allow the conditional display of a polygon.
The condition could be time of day or day of year, or perhaps an aircraft

Hello, from pure logic: Polygons are rendered to ground in the moment of
scenery loading. So I suppose you cant expect them to dynamicaly turn on/off.
May be to load or not to load but it is then fixed until scenery is reloaded.
Maybe you can explain what you want to acheve… Cheers

Lake or puddle ice comes to mind, displayed as day of the year or ambient
temperature. Water poly flooding as time of year or when raining? Perhaps
projected mesh to achieve this?

Let them be loaded, what is desirable is the ability to control their