I don't have a render, Ulco, I was just testing it out trying to see which way the objects pointed when they are populated on the second planet's ceiling, I tried billboards to begin with, only to find that they still stand vertical in world-space(I already knew this but I was hoping for surprises!
), then I tried some TG grass clumps, I might have something in the temp files...
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Yes, just the default setup posted on page 1, with no surfaces and only grass on the walls. Horrible! But, something could be done with the idea, I'm sure. You can still see the seams but the objects are quite flat, entirely populating it with spheres(or near-spherical rocks), for instance, would stop the population rotation issue being a problem.
I might play with this again if I have any ideas.