Hi there!
Thanks to Oshyans kind explanation I finally understood how the Mola displacement works.
I made some testrenders of Hebes Chasma just for comparison of resolutions:
Mola 16pix/°:
Mola 32:
Mola 64:
Mola128:
Astonishingly, the 16k bumpmap I´ve been using for years now isn´t that bad, comes close to 64:
And thats the goal:
stay tuned, although it may take me some time
Cheers,
Jan