Below are a couple of screenshots to give an example of the recent changes to the planet generation code. Currently, the cloud layer is not being drawn as I am still working through some issues with integrating the NASA cloud maps into the new code.
The color maps I am using will get tweaked a lot but I have a lot more depth to work with now. And because there are more pixels, the rotation of the planets no longer looks jerky.
Example terran planet (Earth analogue):
Example Dead planet (Mars analogue):
Example Toxic planet (Titan analogue):
What the low-res planets used to look like (anything larger had serious pixelation issues):