Well the idea here was simply "can I make an isosurface landscape in less than 256 bytes of code?". It turns out that it is cutting it close, since necessary words like "isosurface", "function", and "contained_by" take up a lot of bytes. So, I sacrificed the material on the landscape, opting instead to use a media (with scattering for the red part and emitting for the blue) so that the landscape still has a visible shape, which is detailed enough to hide the fact that it's totally black.

The clouds were an afterthought, but my media needed a containing shape (pov seems to have a glitch where media likes to accumulate to white if it's filling an infinite volume) so I just slapped a granite pattern on that, which gave a nice illusion of clouds.