Rather than just showing an environment icon, consider adding a secondary icon of the map's vehicle as-well, a bit like TMX shows two icons for EnvironmentMix tracks, first the environment, then the car.
Example image (icon 1 is an Island track with SnowCar, icon 2 is a Rally environment track with DesertCar, icons 3 & 4 are normal non-envimix Snow and Rally tracks with the same car as the environment):

Rather than just showing an environment icon, consider adding a secondary icon of the map's vehicle as-well, a bit like TMX shows two icons for EnvironmentMix tracks, first the environment, then the car.
Example image (icon 1 is an Island track with SnowCar, icon 2 is a Rally environment track with DesertCar, icons 3 & 4 are normal non-envimix Snow and Rally tracks with the same car as the environment):
