Merge branch 'pr-384' into jgrpp

src/road_cmd.cpp

@@ -2477,12 +2477,19 @@ static const Roadside _town_road_types_2[][2] = {
 static void TileLoop_Road(TileIndex tile)
 {
 	switch (_settings_game.game_creation.landscape) {
-		case LT_ARCTIC:
-			if (IsOnSnow(tile) != (GetTileZ(tile) > GetSnowLine())) {
+		case LT_ARCTIC: {
+			/* Flat foundation tiles should look the same as the tiles they visually connect to. */
+			int tile_z = GetTileZ(tile);
+			if (tile_z == GetSnowLine()) {
+				GetFoundationSlope(tile, &tile_z);
+			}
+
+			if (IsOnSnow(tile) != (tile_z > GetSnowLine())) {
 				ToggleSnow(tile);
 				MarkTileDirtyByTile(tile);
 			}
 			break;
+		}
 
 		case LT_TROPIC:
 			if (GetTropicZone(tile) == TROPICZONE_DESERT && !IsOnDesert(tile)) {