Steve, I'll wager you're still filling the planet to its core with clouds. To make concentric layers with 3 different planets with 3 seperate radii, you'll want to limit the
depth of your clouds to limit how far back and forward of their
altitude they're reaching.
'Test1' is your .tgd with the new concentric sizes and each planet filled to its core with cloud. It looks not unlike your unedited .tgd renders(except the quality), I moved the sun to 130° from 90° as it was shining the clouds up too much, I'd bet if I moved it to 90° and rendered there wouldn't be much difference in my test and yours. No cigar!
So, I've changed the cloud depths, and their densities to match, and this method works fine for concentric layers of cirrus clouds(you can do this in TG anyway the conventional way with 3d cirrus layers so this seems like work that's done already but, it's worth doing anyway, just to see.
).
Bear in mind: my metacloud model was originally designed(but not bound.
) to be used as blocks of fluff that could be built into cloud formations.
As such, the one-density-fractal-does-all method works well. You'll want to add different density fractals to each layer because, at such varying distances, they won't look as good, obviously.
Original with concentric clouds at full cover = test1.
Edited cloud depths = test2.
Edited.tgd is attatched.
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INSTANT EDIT: I also moved the camera slightly because it was inside a cloud.
