Clouds

[fluffyfreak]

Add clouds and churning gaseous atmosphere for various world types.

There's a forum thread with links to various techniques.

[fluffyfreak]

Interesting cloud and volume rendering techniques in the Siggraph 2015 courses

[fluffyfreak]

clouds-noise branch, WIP noise based 2D cloud layer.
Also see clouds-analysis branch for terrain information extraction methods etc.

[fluffyfreak]

Hadley (and other) Cell calculations
http://earthscience.stackexchange.com/questions/992/what-factors-determine-the-number-of-hadley-cells-for-a-planet
http://saturn-archive.jpl.nasa.gov/news/cassinifeatures/feature20070601f/
http://earthscience.stackexchange.com/questions/388/why-does-the-hadley-cell-descend-at-30-degrees?lq=1
http://www.astrobio.net/news-exclusive/rotation-planets-influences-habitability/

I like the idea of there being a different number of these atmospheric circulation "Cells" (Really tubes around the planet) that affect precipitation and thus biomes but it might be easier for now to just say that there's always 3 either side of the equator (6 total) like on Earth.