It's been a while since I saw this effect and I'd just about forgotten about it, but I encountered it again while flying some test missions in PWCG last night:
RoF - Map zig-zag test 1 before.jpg 492.86KB 3 downloads
I know absolutely nothing about how the maps in RoF are made or how to modify them, but I gotta believe that there must be some way to fix these areas so that this visual atrocity goes away. If anybody could give me or point me to a tutorial on how to play around with maps, I'd be happy to take a stab at trying to get rid of this weirdness - I'm thinking maybe just pushing the forests back from the trenches should help (I only remember seeing this along the front - not in areas away from the front), and if possible maybe including some strip of new land texture that would basically be cut down/blown down tree stumps or something like that as a buffer between the front line textures and the forests.
Of course, it'd be even better if some of the folks who actually know what they're doing around these maps would just take care of this, but failing that I wouldn't mind the challenge of trying to fix this thing if someone can point me in the right direction.