Ok guys so aside from everyone running away happy with Robs TG file, we can continue this effort by collaborating and improving on what he has put so much work on. So he can no loger work on this but there are lots of people interested in this and although I am still not happy with the "Terracell" name I will contribute with my piece of the puzzle.
First of all and very important is that Robs file its untouched meaning all components are there, just modifications to the settings to get rid of atmosphere patching and improving on the saturation. Also a bit of tweaking on the colors to display more realistic continents.
Besides that I added the cloud layer which was not there and set it up to produce a believable global distribution.
The cloud layer its a 2d cirrus layer as there is no point to slow the thing to a crawl by putting in a 3d layer that will not even show difference at this level.
So here is a quick render 42 minutes and the file