This is thanks to Muizer for his posts here:
https://forums.totalwar.org/vb/showp...8&postcount=19
https://forums.totalwar.org/vb/showp...9&postcount=21

The title is a reference to this post:
https://forums.totalwar.org/vb/showp...63&postcount=5

And the screenshots are:




For members who need a little more background - some months ago, inspired by Chivalry, I started playing around with battlefield textures. I got a few weird 'alien world' patterns going but they only worked on the battle tile itself, beyond the borders of the mini-map the colours were unchanged. Now, though, Muizer has posted a solution!