Feral Heart

I recently downloaded a map for a group that I'm in. Everyone can see the ice and snow, but to me the ground and water are the same as when I travel to every map. I've tried to download the miscellaneous file to Terrains and to Exports, but neither work. I have another map that has a miscellaneous file that is working just fine in Exports. Could this be a bad graphics card? Do I need to reinstall the game?

Thank you for any help you can give me.