Replying a year later just to say this saved my Elk Mountain Wyoming map too!
just started playing pc and having this issue but I can’t find the terrain shader xml in the files anywhere
It's inside the mod rar file directly, You have to unzip this file and change the file located at "\FS22_ElkMtnWyoming\maps\mapUS\data\terrainShader.xml" then you will have to compress the folder back into a zip file.
