diff --git a/OpenRA.Game/World.cs b/OpenRA.Game/World.cs
index 1ad996673b..98bffa816a 100644
--- a/OpenRA.Game/World.cs
+++ b/OpenRA.Game/World.cs
@@ -194,6 +194,35 @@ namespace OpenRA
 					player.Shroud.ExploreAll(this);
 		}
 
+		public void AddToMaps(Actor self, IOccupySpace ios)
+		{
+			ActorMap.AddInfluence(self, ios);
+			ActorMap.AddPosition(self, ios);
+
+			if (!self.Bounds.Size.IsEmpty)
+				ScreenMap.Add(self);
+		}
+
+		public void UpdateMaps(Actor self, IOccupySpace ios)
+		{
+			if (!self.IsInWorld)
+				return;
+
+			if (!self.Bounds.Size.IsEmpty)
+				ScreenMap.Update(self);
+
+			ActorMap.UpdatePosition(self, ios);
+		}
+
+		public void RemoveFromMaps(Actor self, IOccupySpace ios)
+		{
+			ActorMap.RemoveInfluence(self, ios);
+			ActorMap.RemovePosition(self, ios);
+
+			if (!self.Bounds.Size.IsEmpty)
+				ScreenMap.Remove(self);
+		}
+
 		public void LoadComplete(WorldRenderer wr)
 		{
 			// ScreenMap must be initialized before anything else
diff --git a/OpenRA.Mods.Common/Traits/Air/Aircraft.cs b/OpenRA.Mods.Common/Traits/Air/Aircraft.cs
index ae5428f29e..fea619a866 100644
--- a/OpenRA.Mods.Common/Traits/Air/Aircraft.cs
+++ b/OpenRA.Mods.Common/Traits/Air/Aircraft.cs
@@ -134,9 +134,8 @@ namespace OpenRA.Mods.Common.Traits
 
 		public void AddedToWorld(Actor self)
 		{
-			self.World.ActorMap.AddInfluence(self, this);
-			self.World.ActorMap.AddPosition(self, this);
-			self.World.ScreenMap.Add(self);
+			self.World.AddToMaps(self, this);
+
 			var altitude = self.World.Map.DistanceAboveTerrain(CenterPosition);
 			if (altitude.Length >= Info.MinAirborneAltitude)
 				OnAirborneAltitudeReached();
@@ -353,8 +352,8 @@ namespace OpenRA.Mods.Common.Traits
 			if (!self.IsInWorld)
 				return;
 
-			self.World.ScreenMap.Update(self);
-			self.World.ActorMap.UpdatePosition(self, this);
+			self.World.UpdateMaps(self, this);
+
 			var altitude = self.World.Map.DistanceAboveTerrain(CenterPosition);
 			var isAirborne = altitude.Length >= Info.MinAirborneAltitude;
 			if (isAirborne && !airborne)
@@ -603,9 +602,8 @@ namespace OpenRA.Mods.Common.Traits
 		public void RemovedFromWorld(Actor self)
 		{
 			UnReserve();
-			self.World.ActorMap.RemoveInfluence(self, this);
-			self.World.ActorMap.RemovePosition(self, this);
-			self.World.ScreenMap.Remove(self);
+			self.World.RemoveFromMaps(self, this);
+
 			OnCruisingAltitudeLeft();
 			OnAirborneAltitudeLeft();
 		}
diff --git a/OpenRA.Mods.Common/Traits/Crates/Crate.cs b/OpenRA.Mods.Common/Traits/Crates/Crate.cs
index 01c7ea08ce..d8ec47e7ce 100644
--- a/OpenRA.Mods.Common/Traits/Crates/Crate.cs
+++ b/OpenRA.Mods.Common/Traits/Crates/Crate.cs
@@ -157,11 +157,7 @@ namespace OpenRA.Mods.Common.Traits
 		public void SetVisualPosition(Actor self, WPos pos)
 		{
 			CenterPosition = pos;
-			if (self.IsInWorld)
-			{
-				self.World.ScreenMap.Update(self);
-				self.World.ActorMap.UpdatePosition(self, this);
-			}
+			self.World.UpdateMaps(self, this);
 		}
 
 		// Sets only the location (Location)
@@ -207,9 +203,7 @@ namespace OpenRA.Mods.Common.Traits
 
 		public void AddedToWorld(Actor self)
 		{
-			self.World.ActorMap.AddInfluence(self, this);
-			self.World.ActorMap.AddPosition(self, this);
-			self.World.ScreenMap.Add(self);
+			self.World.AddToMaps(self, this);
 
 			var cs = self.World.WorldActor.TraitOrDefault<CrateSpawner>();
 			if (cs != null)
@@ -218,9 +212,7 @@ namespace OpenRA.Mods.Common.Traits
 
 		public void RemovedFromWorld(Actor self)
 		{
-			self.World.ActorMap.RemoveInfluence(self, this);
-			self.World.ActorMap.RemovePosition(self, this);
-			self.World.ScreenMap.Remove(self);
+			self.World.RemoveFromMaps(self, this);
 
 			var cs = self.World.WorldActor.TraitOrDefault<CrateSpawner>();
 			if (cs != null)
diff --git a/OpenRA.Mods.Common/Traits/Husk.cs b/OpenRA.Mods.Common/Traits/Husk.cs
index 92879d3025..426de9ba25 100644
--- a/OpenRA.Mods.Common/Traits/Husk.cs
+++ b/OpenRA.Mods.Common/Traits/Husk.cs
@@ -106,22 +106,18 @@ namespace OpenRA.Mods.Common.Traits
 			CenterPosition = pos;
 			TopLeft = self.World.Map.CellContaining(pos);
 			self.World.ActorMap.AddInfluence(self, this);
-			self.World.ActorMap.UpdatePosition(self, this);
-			self.World.ScreenMap.Update(self);
+
+			self.World.UpdateMaps(self, this);
 		}
 
 		public void AddedToWorld(Actor self)
 		{
-			self.World.ActorMap.AddInfluence(self, this);
-			self.World.ActorMap.AddPosition(self, this);
-			self.World.ScreenMap.Add(self);
+			self.World.AddToMaps(self, this);
 		}
 
 		public void RemovedFromWorld(Actor self)
 		{
-			self.World.ActorMap.RemoveInfluence(self, this);
-			self.World.ActorMap.RemovePosition(self, this);
-			self.World.ScreenMap.Remove(self);
+			self.World.RemoveFromMaps(self, this);
 		}
 
 		public bool Disabled
diff --git a/OpenRA.Mods.Common/Traits/Mobile.cs b/OpenRA.Mods.Common/Traits/Mobile.cs
index 9e4a548a83..0cfc5d6266 100644
--- a/OpenRA.Mods.Common/Traits/Mobile.cs
+++ b/OpenRA.Mods.Common/Traits/Mobile.cs
@@ -430,25 +430,17 @@ namespace OpenRA.Mods.Common.Traits
 		public void SetVisualPosition(Actor self, WPos pos)
 		{
 			CenterPosition = pos;
-			if (self.IsInWorld)
-			{
-				self.World.ScreenMap.Update(self);
-				self.World.ActorMap.UpdatePosition(self, this);
-			}
+			self.World.UpdateMaps(self, this);
 		}
 
 		public void AddedToWorld(Actor self)
 		{
-			self.World.ActorMap.AddInfluence(self, this);
-			self.World.ActorMap.AddPosition(self, this);
-			self.World.ScreenMap.Add(self);
+			self.World.AddToMaps(self, this);
 		}
 
 		public void RemovedFromWorld(Actor self)
 		{
-			self.World.ActorMap.RemoveInfluence(self, this);
-			self.World.ActorMap.RemovePosition(self, this);
-			self.World.ScreenMap.Remove(self);
+			self.World.RemoveFromMaps(self, this);
 		}
 
 		public IEnumerable<IOrderTargeter> Orders { get { yield return new MoveOrderTargeter(self, this); } }