3D polygons cover an area and add an additional 3D height visible when the map is tilted.
To add a polygon to your Polygon post, press "Replace Drawing" and start to click on the map, clicking twice on a point to finish the polygon area. You can also upload a geoJSON if you prefer.
To see the 3D nature of the polygon, be sure to tilt the map by holding the right mouse button and dragging the map.
Color [Pro]
Set the color of the polygon.
Base Height [Pro]
This is the bottom height of the polygon. By default this will be on the ground, but you can make it higher if you like.
Top Height [Pro]
This is the top of the polygon. It should be a larger number than the base height.