Only thing that is bothering me is how to add such nice water sources like river, or lake. How can I achieve this: using displacement/bump maps, extruding water, sculpting the sphere or something completely different. What would be the most convenient way?
that looks (at least the part we can see in the still) like one (or maybe two) sphere(s) that either use sculpting or displacement (no point in using bump excepting for details) to make the canal/river. Possibly the lakes are the same, done by hand, or maybe it's part spherical Landscape and part sculpt/displacement map.