So here is the pencil sketch I have done so far.
I am trying to get an isometric view of the landscape showing the hills, mountains and flatlands.
Dragon Lands of Glorantha - isometric sketch -01
The labels are just temporary at the moment just to give an idea for comparison of the two maps.
I still have quite a bit to do to finish it off.
One thing I may struggle with is doing the large swamp as I haven't got a clue how to represent it.