3D Polygons

[capuanomat]

Is your feature request related to a problem? Please describe.
There doesn't appear to be a feature to visualize 3D polygons without them being tied to the ground. For instance, the Polygon layer can take in a 2D polygon and altitude (height), but then plots it as an extension from the ground. It would be tremendously useful to have these polygons as floating obstacles.

Describe the solution you'd like
It seems the simplest solution would be to include a "lower" and "upper" input to the Polygon layer. While this would enforce that the top and bottom of the 3D polygons are flag, it seems like a simple starting point.

Describe alternatives you've considered
I've tried having two polygons with the same lat-lngs, but the min and max altitudes separately, then use the subtractive Layer Blending feature, but that doesn't do the trick. The 3D layer itself just prints ducks?