Funny JM as I find ROF terrain a bit "cartoonish". Can't describe this feel better. Surely it had the adventage of being the most advanced engine-wise, but for starters doesn't has that French feel to it (in fact, WW1 aerial photos show more rectangular fields, like the ones you'll find in stock FE/FE2), lacks variety (same repeating tiled textures -more noticeable in mission editor from zoomed out view), especially when it comes to forests (J.Tuma's FE2 one is better in the area of general foliage and tiles variety, hats off Jan!) which while beautiful are boring to fly over, and the noman's land is simply ugly. Looks like Twilight Side of the Moon to me.
And no, I tried setting some tank battle in ME, didn't worked, but that was several updates ago.
But ROF cities... oh, these are beautifully recreated! I CRY for custom used-made .TOD shapes for SF series since I started my terrain modding.
FC2 terrain engine is slightly improved over LOMAC (don't know abou BS) and while old, still good technically (roads network, working bridges, nice mountains and cities etc) and enjoyable to fly over in a Hog.
Heavily modded SF/FE terrains aren't that bad, given the years, years old terrain engine (that goes back to the times of EAW).
My opinion, of course. And I'd gladly take both new terrain/environment engine, and updated avionics/carrier ops/"war engine". Even if that's more than two