What is the most efficent technique for blending regional palettes in GIMP?

[Ascension]

I just turn down the opacity or flow or both and just paint the colors by hand, building up more color where needed and leaving it pale/translucent where things smudge together. As to red and green blending together, they are opposites so when blended they should turn brown.

[Porklet]

I just turn down the opacity or flow or both and just paint the colors by hand, building up more color where needed and leaving it pale/translucent where things smudge together. As to red and green blending together, they are opposites so when blended they should turn brown.

When you say opacity/flow are you referring to the Brush/Pencil? Do you alternate colors, or do you try to find the median color for the two regions?

[Hai-Etlik]

"Dark Green Tundra"? Did you perhaps confuse Tundra (Treeless arctic plain with permafrost layer) with Taiga (Subarctic forest)?

[Porklet]

"Dark Green Tundra"? Did you perhaps confuse Tundra (Treeless arctic plain with permafrost layer) with Taiga (Subarctic forest)?

It should have read light grey tundra to green fields. Sorry about that.