diff -r f540f1fb6bd9 -r 2e1e4d2f71dd src/clear_cmd.cpp
--- a/src/clear_cmd.cpp	Sun May 25 20:00:10 2008 +0000
+++ b/src/clear_cmd.cpp	Sun May 25 22:36:44 2008 +0000
@@ -218,7 +218,7 @@
 {
 	TileLoopClearHelper(tile);
 
-	switch (_opt.landscape) {
+	switch (_settings.game_creation.landscape) {
 		case LT_TROPIC: TileLoopClearDesert(tile); break;
 		case LT_ARCTIC: TileLoopClearAlps(tile);   break;
 	}
@@ -346,7 +346,7 @@
 
 void InitializeClearLand()
 {
-	_opt.snow_line = _settings.game_creation.snow_line_height * TILE_HEIGHT;
+	_settings.game_creation.snow_line = _settings.game_creation.snow_line_height * TILE_HEIGHT;
 }
 
 static CommandCost TerraformTile_Clear(TileIndex tile, uint32 flags, uint z_new, Slope tileh_new)