Hi alien people, I could spend sometime in studying for my universe generator yesterday and I created a work for that using the planets I have generated before.
Final image
I have followed this outdated tutorial to finish this work and updated it's first step that addresses some resources that aren't available anymore with a landscape generator tool that's available by default on blender.
Middle step image just following the tutorial
Here are the steps to follow to create your landscape with the default landscape generator tool on blender 3.0.
First enable the generator on Edit->Preferences->Addons
Then you'll be able to add a landscape from the Add->mesh menu
When you add a landscape from the menu you'll find a little contextual panel on the lower left of the main 3D viewport, click on it and you'll be able to customise the generated landscape with many options:
The most useful option in this window is the choiche between landscape presets you can even choose symbols to work on!
Keep in mind that you can choose anytime to put your generated landscape on a planet just by choosing an option on the generator panel.
I'll try to integrate this tool with my planet generator before publishing it.
Let me know if you do something with this!