Have had some problems with seeing the difference on the Blue and the Red Trolls when playing with Large field.
So made the Red trolls more Red.
Just download them and rename them as the icon picture name of your trolls (in Large Icon folder)
Is in no way trying to take credit for the icons themselves - I have not created these Trolls - just made them a bit more Red for easier distinction from the blue trolls.
If anyone have suggestions to other icon changes/creations - I would love to give it a try. Is finally due to long time sickness having the time to learn using Gimp. And things people can use for something is more fun to do than just random stuff.