Hmmm .. even though I completely removed the "snow" from the desert gradients, applying the mountain bump layer still created snow in the desert mountains ..
I helped myself out by blackening out the according parts in the layer mask and by adding/using another "color variant" layer, working the same as in your forest tutorial

Regarding the arctic, I think I basically did, what you described in your last posting, then I just removed a little bit from the layer mask to "bleach out" the grass land intended to become a tundra .. For the pole caps I used a blue/white layer

Since you've been incredibly helpful with replying as well as (and even more so) with your tutorial(s) showing the possibilities of Gimp, I've been able to create a wonderful looking map (see attached) of which I'm actually very proud (it's a fantasy map, so screw any geographical logic ).

Attachment 58550

Now going onwards to details, such as kingdoms' borders, capitals, decorations and stuff



Thanks again for your outstanding support and kind regards,
Kai