Since there was quite some interest in what my simple gas giant shader code can produce, I’ve compiled a few pictures with different color settings to showcase:
The last planet (number 9, on the bottom right) is an example what you get when changing the octave setting of the fBm. Important to note is, that this method can easily be used to generate “earth-like” planets – with green land, surrounding oceans and clouds (see planet 6). All you need to do is to remove the time-dependent animation of the domain warping (so the iTime in the calculation of r,q,v) to generate a static “flow” – otherwise the lands will be shifting quite fast 😉