That's an interesting link. Thank you.

As to building skies efficiently, I wonder if this will work:

1. Render one of Bryce's marvelous skies as a 360 degree panorama, then save it as a bmp. Multiples of 16 for the sides will of couse be needed.

2. In WED, add a 16 sided cylinder, then scale it up as if it was a sky box.

3. Hollow the cylinder, then texture with the panorama.

Don't know if taking the top and/or bottom off the cylinder will yeild better results.

I haven't tried this yet, but I'll bet it works nicely.
Let us know if you discover anything particularly intersting about this method and I shall do the same. It has got to texture better than a hollow box. But then maybe not .