Great work, James!
My congratulations!

I know about your work Collada model only and make near kml.
See this post
http://bbs.keyhole.com/ubb/showflat.php?Cat=0&Number=676926&page=0&vc=1#Post676926

I think about 2-3 levels with colors and transpacrency.
http://bbs.keyhole.com/ubb/download.php?Number=676926
We can create very nice pictures. Maybe you can use this ideas also.

Valery.
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