polygon feature class in WFS has two altitude fields (lower and upper). How can I extrude these into 3d in the javascript api?

[FrankieEast]

I have many (640 or so) feature classes (polygon) that have lower and upper altitudes.  I can easily extrude polygons from the ground to a height in 3d using the javascript api, but have not found a way to do this using the lower altitude as the bottom rather than the ground.  This can be done in arc scene.  Can it be done in the javascript api?  I ask this because the data in the service is updated frequently (in some cases every five minutes).

[FrankieEast]

Awesome, that should cover keeping a flightpath above ground also.  Some waypoints for a route will have great distances between them and I was concerned the same would happen.