Make in the arctic and temperate climate a smooth transition from grass to snow instead of three steps.

The grf load in the arctic climate a transition with arctic and in the temperate a transition with temperate grass. If you use a grf, which insert temperate grass in the arctic climate, you must set the parameter 0 for temperate grass there!

this grf has the CC BY-SA licence ( http://creativecommons.org/licenses/by-sa/2.5/ch/ )