
Truth be told, I was actually quite happy with the original terrain graphics of Shadow Empire, save a couple glaring issues that really rankled me: the angular, flat colored transportation lines (roads/rails), and the difficulty seeing low mountains and savannah terrain.
So, I set about fixing those for myself using GIMP. At that time, I intended to stop there and just use the mods for myself.
But I thought others might have the same gripes as I did and posted the early version of the mod here on the forums. Following some fairly positive feedback, and because I was having fun learning how to do this sort of artwork in GIMP, I went ahead and modified a few more terrain features to add relief. But those mods were essentially the original terrain from the game (like the grassy/rocky plains, sand and such), just enhanced with GIMP.
As I learned, and with a little nudging from the community, I then departed from my original goal and started enhancing and changing terrain artwork on a purely aesthetic basis (like the forests/jungles and lava lakes). I had concerns about going down that path because (a) I don't want to fix something that isn't broken, (b) endless tweaking of gets tiresome for both creator and audience, and (c) aesthetics is very subjective.
Nevertheless, I was satisfied with the result as of version 3.4, so I stopped there. In any event, v3.4 is pretty much at my skill-limit for GIMP, so I doubt I could improve further. (If anyone else can, have a go of it! I'd love to see what you come up with.)
I find the game easier to play with my terrain mod (no surprise there), and very happy that others may as well. In the end, it's all just a matter of personal preference... except for those nasty original transportation lines - I'll fight you on that one! Those just hurt the eye!

-Mark R.