u/BestMaterial8300

Hey y'all, looking to get a specific effect for a map I'm gonna make.

The fight will be taking place on the 72nd floor of a very large sky scraper that has, like, an open floor center. The enemies will be flying from the open floor over the railing onto the map. Since it's sci-fi, they have ranged weapons so I want them to be able to shoot them before they make it onto the map, meaning I need the space on the other side of the balcony to be on the map as well.

How would I capture a large drop of elevation like that artistically? Or do I just make it black for ease of sake? Regardless, any help would be appreciated, tyty.