While I doubt it is possible, I would think it would be cool if different biomes treated canyons differently. Lush would have overgrown trees like one sees in parts of China and Vietnam while others might have a mist rising out of it.

Why Firaxis put so much effort in the number of biomes and then did little to actually make them look different is supprising. I mean did the Canyon design team just fart around and not really do anything because it sure looks like it.

The canyons are identical in all the biomes as far as i know, i had a look at the textures.... there is a separate texture for every biome, but it is the same file.