Spatially partition some actor overlays

OpenRA.Mods.Cnc/Traits/Minelayer.cs

@@ -156,6 +156,8 @@ namespace OpenRA.Mods.Cnc.Traits
 					WVec.Zero, -511, pal, 1f, true);
 		}
 
+		bool IRenderAboveShroudWhenSelected.SpatiallyPartitionable { get { return false; } }
+
 		class MinefieldOrderGenerator : IOrderGenerator
 		{
 			readonly List<Actor> minelayers;

OpenRA.Mods.Cnc/Traits/Render/RenderJammerCircle.cs

@@ -60,5 +60,7 @@ namespace OpenRA.Mods.Cnc.Traits
 					Color.FromArgb(96, Color.Black));
 			}
 		}
+
+		bool IRenderAboveShroudWhenSelected.SpatiallyPartitionable { get { return false; } }
 	}
 }

OpenRA.Mods.Cnc/Traits/Render/RenderShroudCircle.cs

@@ -56,5 +56,7 @@ namespace OpenRA.Mods.Cnc.Traits
 		{
 			return RangeCircleRenderables(self, wr);
 		}
+
+		bool IRenderAboveShroudWhenSelected.SpatiallyPartitionable { get { return false; } }
 	}
 }