Area

Areas are features of open spaces, describing the vertical relationship with the nearby foreground blocks. This affects where Monsters may spawn, similar to Regions. The three possible areas are surface, ceiling, and air.

Surface

The surface is the area just on top of the ground. Monsters that tend to walk spawn here.

Ceiling

The ceiling is the area just below the ceiling. Monsters that tend to crawl or hang spawn here.

Air

The air is the area far from any solid structure. Monsters that tend to fly spawn here.