made a real terrain type for it; still not quite right though. will crash on snow maps atm too.

OpenRa.Game/Bridges.cs

@@ -42,7 +42,7 @@ namespace OpenRa
 							// stash it
 							replacedTiles[new int2(x, y)] = w.Map.MapTiles[x, y].image;
 							// remove the tile from the actual map
-							w.Map.MapTiles[x, y].tile = 0xff;
+							w.Map.MapTiles[x, y].tile = 0xfffe;
 							w.Map.MapTiles[x, y].image = 0;
 						}
 				}

OpenRa.Game/Graphics/Minimap.cs

@@ -49,7 +49,7 @@ namespace OpenRa.Graphics
 			if (terrainTypeColors == null)
 			{
 				var pal = new Palette(FileSystem.Open(Game.world.Map.Theater + ".pal"));
-				terrainTypeColors = new[] {theater.ToLowerInvariant() == "snow" ? 0xe3 :0x1a, 0x63, 0x2f, 0x1f, 0x14, 0x64, 0x1f, 0x68, 0x6b, 0x6d }
+				terrainTypeColors = new[] {theater.ToLowerInvariant() == "snow" ? 0xe3 :0x1a, 0x63, 0x2f, 0x1f, 0x14, 0x64, 0x1f, 0x68, 0x6b, 0x6d, 0x67 }
 					.Select( a => Color.FromArgb(alpha, pal.GetColor(a) )).ToArray();
 				
 				playerColors = Util.MakeArray<Color>( 8, b => Color.FromArgb(alpha, Chat.paletteColors[b]) );

OpenRa.Game/TerrainCosts.cs

@@ -23,16 +23,17 @@ namespace OpenRa
 		Wall = 7,
 		Beach = 8,
 		Ore = 9,
+		Special = 10,
 	}
 
 	static class TerrainCosts
 	{
 		static double[][] costs = Util.MakeArray<double[]>( 4,
-			a => Util.MakeArray<double>( 10, b => double.PositiveInfinity ));
+			a => Util.MakeArray<double>( 11, b => double.PositiveInfinity ));
 
 		static TerrainCosts()
 		{
-			for( int i = 0 ; i < 10 ; i++ )
+			for( int i = 0 ; i < 11 ; i++ )
 			{
 				if( i == 4 ) continue;
 				var section = Rules.AllRules.GetSection( ( (TerrainMovementType)i ).ToString() );
@@ -46,6 +47,7 @@ namespace OpenRa
 
 		public static double Cost( UnitMovementType unitMovementType, int r )
 		{
+			if (r >= 10) return 1.0;
 			return costs[ (byte)unitMovementType ][ r ];
 		}
 	}

OpenRa.Game/Traits/Production.cs

@@ -9,7 +9,7 @@ namespace OpenRa.Traits
 		public readonly int[] SpawnOffset = null;
 		public readonly string[] Produces = { };
 
-		public object Create(Actor self) { return new Production(self); }
+		public virtual object Create(Actor self) { return new Production(self); }
 	}
 
 	class Production : IIssueOrder, IResolveOrder, IProducer, ITags

OpenRa.Game/Traits/ProductionSurround.cs

@@ -3,9 +3,9 @@ using OpenRa.GameRules;
 
 namespace OpenRa.Traits
 {
-	class ProductionSurroundInfo : ITraitInfo
+	class ProductionSurroundInfo : ProductionInfo
 	{
-		public object Create(Actor self) { return new ProductionSurround(self); }
+		public override object Create(Actor self) { return new ProductionSurround(self); }
 	}
 
 	class ProductionSurround : Production

RulesConverter/Program.cs

@@ -138,6 +138,10 @@ namespace RulesConverter
 					{ "Produces", "Produces" } }
 				},
 
+				{ "ProductionSurround", new PL {
+					{ "Produces", "Produces" } }
+				},
+
 				{ "Minelayer", new PL {
 					{ "Mine", "Primary" } }
 				},

ra.yaml

@@ -999,6 +999,7 @@ SYRD:
 		Sight: 4
 	RenderBuilding:
 	ProductionSurround:
+		Produces: Ship
 	IronCurtainable:
 
 SPEN:
@@ -1023,6 +1024,7 @@ SPEN:
 		Sight: 4
 	RenderBuilding:
 	ProductionSurround:
+		Produces: Ship
 	IronCurtainable:
 
 FACT:

templates.ini

@@ -2822,3 +2822,9 @@ tiletype18=2
 tiletype19=2
 tiletype23=2
 tiletype24=2
+
+[TEM65534]
+Name=Bogus
+width=1
+height=1
+tiletype0=10

tileSet.til

@@ -304,3 +304,8 @@ gflr{0:0000}
 0118
 gstr{0:0000}
 
+; bogus
+TS-
+1
+fffe
+bogus