making a Cesium.GeometryInstance() "unselectable"?

I have a large overlay I'm adding to the viewer. I want this overlay area to be "unselectable", as in clicking it would provide the same result as clicking on any empty place on the map. Is this possible?

I'm aware the viewer has an option called "enablePickFeatures" which when set to false renders the imagery-layer as "unselectable" in the way I have described.

Any help on this would be greatly appreciated.


I’m a little unsure about what you are trying to do. How are you adding the overlay to the viewer? It would be helpful if you could post a code sample.