Does this capability exist in freeware 3D editing software?

[Winston]

Wow! What a phenomenally helpful group you all are! I greatly appreciate the help and will work with what I've learned here.

[Roxy]

Wow! What a phenomenally helpful group you all are! I greatly appreciate the help and will work with what I've learned here.

If you zoom way in... You will see each of those objects is made by making a little polygon (using the cube() function) of the appropriate height. There will be little stair steps between any two polygons of different heights. You can smooth that all out by putting the code inside a hull() { code-goes-here } That will take the existing shape and make a smooth hull around it.