Oh well, that's neither your nor MicroDEM's fault.
There is just no good data above 60°N or below 60°S. The Black Sea, Caspian Sea and the Great Lakes in the US are also missing. Lakes and inland seas seem to be a big problem, especially if they're not exactly at sea level. The site I linked in my previous post isn't very helpful either. It has decent height data for the north and south, but it's somewhat more complicated to get the coastlines right.
There is a rather time consuming solution I just tried that involves some advanced image editing. See the attachment for results. I'll probably write a new tutorial for getting the perfect heightmap soon. MGSteve doesn't seem to be around anymore to edit this one.
For now, if you still want to make that Hungary-Ukraine-Bulgaria-Romania scenario, I could just quickly make a heightmap for you. Just say a word if you're interested. I'm always happy to help other mapmakers.
I'm working on a more complete map of Europe myself. The one by Carst
was very fun to play with, but a complete map of Europe should not end in eastern Poland and southern Sweden. Scandinavia to at least 65° N, Belarus and most of Ukraine should be included, maybe even Moscow.
Attached a heightmap of the whole world for everybody to use. I haven't downloaded the complete data for the extreme north and south yet, but I know how to make it into a working heightmap. Stay tuned for more.
...and another example of what is possible with my (soon to be published) method of creating heightmaps: The first draft of the 2048x2048 Expanded Europe Scenario. So far it is automatically populated
with 538 towns (every town with a real life population >100000). The original heightmap is 6500x6500 pixels. Could have made it bigger, but I don't see why anybody would need that.