Those graphics are beautiful! I can see you've been busy.
I actually just picked up GIMP for myself a couple days ago. I haven't gotten around to making buildings or resources yet... I've been working out the tech tree, making some tech icons.
I don't know how to post downloads for them, either... but I
can post previews of what I've done so far. I guess once I finish the tech tree I'll release them all as a pack. I still have quite a few more to do.
Here's what I've done:
This is for an elf-specific government, Magocracy. It boosts commerce immensely and completely
negates corruption, but has high war weariness and makes every military unit so costly that the elves can only mantain a bare defense. This is in the spirit of the elves being an empathic race of pacifists.
An evil/orc tech, meant to be reminiscent of the Eye of Sauron.
Just an armor tech for better units
An elfy military tech
Flying castles! For that awesome flying castle unit by Aaglo
A magic tech, for some kind of magic unit
A civ-specific tech for an Egypt-esque civ
A civ-specific governmental/nationalistic tech
Yes, the last one is a colored-in version of a design left in a crop circle in Ohio. I needed a symbol, and it looked perfect for what I had in mind.
EDIT: Please excuse me if I sound a bit overenthusiastic. I'm still very new to modding, and just having those images show up properly in-game is exciting to me.
Also, I forgot to say what those images actually are. This edit corrected that.