diff --git a/OpenRA.Game/Effects/MoveFlash.cs b/OpenRA.Game/Effects/MoveFlash.cs
index aeab773f24..1f457c199b 100755
--- a/OpenRA.Game/Effects/MoveFlash.cs
+++ b/OpenRA.Game/Effects/MoveFlash.cs
@@ -40,7 +40,7 @@ namespace OpenRA.Effects
 
 		public IEnumerable<Renderable> Render()
 		{
-			yield return new Renderable(anim.Image, pos - .5f * anim.Image.size, "shadow");
+			yield return new Renderable(anim.Image, pos - .5f * anim.Image.size, "shadow", (int)pos.Y);
 		}
 	}
 }
diff --git a/OpenRA.Game/Effects/RepairIndicator.cs b/OpenRA.Game/Effects/RepairIndicator.cs
index 3c3b3dabff..961f3a2d0f 100755
--- a/OpenRA.Game/Effects/RepairIndicator.cs
+++ b/OpenRA.Game/Effects/RepairIndicator.cs
@@ -35,7 +35,7 @@ namespace OpenRA.Effects
 		public IEnumerable<Renderable> Render()
 		{
 			yield return new Renderable(anim.Image, 
-				a.CenterLocation - .5f * anim.Image.size, "chrome");
+				a.CenterLocation - .5f * anim.Image.size, "chrome", (int)a.CenterLocation.Y);
 		}
 	}
 }
diff --git a/OpenRA.Game/Graphics/WorldRenderer.cs b/OpenRA.Game/Graphics/WorldRenderer.cs
index ad6e1525ec..7120e5ea93 100644
--- a/OpenRA.Game/Graphics/WorldRenderer.cs
+++ b/OpenRA.Game/Graphics/WorldRenderer.cs
@@ -41,7 +41,7 @@ namespace OpenRA.Graphics
 		{
 			public int Compare(Renderable x, Renderable y)
 			{
-				return (x.Pos.Y + x.Sprite.size.Y + x.ZOffset).CompareTo(y.Pos.Y + y.Sprite.size.Y + y.ZOffset);
+				return (x.Z + x.ZOffset).CompareTo(y.Z + y.ZOffset);
 			}
 		}
 
diff --git a/OpenRA.Game/Traits/TraitsInterfaces.cs b/OpenRA.Game/Traits/TraitsInterfaces.cs
index 934392ff63..c094380ca3 100644
--- a/OpenRA.Game/Traits/TraitsInterfaces.cs
+++ b/OpenRA.Game/Traits/TraitsInterfaces.cs
@@ -138,22 +138,24 @@ namespace OpenRA.Traits
 		public readonly Sprite Sprite;
 		public readonly float2 Pos;
 		public readonly string Palette;
+		public readonly int Z;
 		public readonly int ZOffset;
 
-		public Renderable(Sprite sprite, float2 pos, string palette, int zOffset)
+		public Renderable(Sprite sprite, float2 pos, string palette, int z, int zOffset)
 		{
 			Sprite = sprite;
 			Pos = pos;
 			Palette = palette;
+			Z = z;
 			ZOffset = zOffset;
 		}
 
-		public Renderable(Sprite sprite, float2 pos, string palette)
-			: this(sprite, pos, palette, 0) { }
+		public Renderable(Sprite sprite, float2 pos, string palette, int z)
+			: this(sprite, pos, palette, z, 0) { }
 
-		public Renderable WithPalette(string newPalette) { return new Renderable(Sprite, Pos, newPalette, ZOffset); }
-		public Renderable WithZOffset(int newOffset) { return new Renderable(Sprite, Pos, Palette, newOffset); }
-		public Renderable WithPos(float2 newPos) { return new Renderable(Sprite, newPos, Palette, ZOffset); }
+		public Renderable WithPalette(string newPalette) { return new Renderable(Sprite, Pos, newPalette, Z, ZOffset); }
+		public Renderable WithZOffset(int newOffset) { return new Renderable(Sprite, Pos, Palette, Z, newOffset); }
+		public Renderable WithPos(float2 newPos) { return new Renderable(Sprite, newPos, Palette, Z, ZOffset); }
 	}
 
 	public interface ITraitInfo { object Create(ActorInitializer init); }
diff --git a/OpenRA.Game/Traits/Util.cs b/OpenRA.Game/Traits/Util.cs
index 0a6efdd507..92cbf92377 100755
--- a/OpenRA.Game/Traits/Util.cs
+++ b/OpenRA.Game/Traits/Util.cs
@@ -100,7 +100,7 @@ namespace OpenRA.Traits
 		{
 			var pal = self.Owner == null ? "player0" : self.Owner.Palette;
 			var loc = location - 0.5f * s.size;
-			return new Renderable(s, loc.Round(), pal);
+			return new Renderable(s, loc.Round(), pal, (int)self.CenterLocation.Y);
 		}
 
 		public static IActivity SequenceActivities(params IActivity[] acts)
diff --git a/OpenRA.Mods.Cnc/Effects/IonCannon.cs b/OpenRA.Mods.Cnc/Effects/IonCannon.cs
index 2698101f9d..aa409de00b 100644
--- a/OpenRA.Mods.Cnc/Effects/IonCannon.cs
+++ b/OpenRA.Mods.Cnc/Effects/IonCannon.cs
@@ -36,7 +36,7 @@ namespace OpenRA.Mods.Cnc.Effects
 		{
 			yield return new Renderable(anim.Image,
 				target.CenterLocation - new float2(.5f * anim.Image.size.X, anim.Image.size.Y - Game.CellSize),
-				"effect");
+				"effect", (int)target.CenterLocation.Y);
 		}
 
 		void Finish( World world )
diff --git a/OpenRA.Mods.RA/Bridge.cs b/OpenRA.Mods.RA/Bridge.cs
index d0e20726bf..1b82875838 100644
--- a/OpenRA.Mods.RA/Bridge.cs
+++ b/OpenRA.Mods.RA/Bridge.cs
@@ -134,7 +134,7 @@ namespace OpenRA.Mods.RA
 		public IEnumerable<Renderable> Render(Actor self)
 		{
 			foreach (var t in TileSprites[currentTemplate])
-				yield return new Renderable(t.Value, Game.CellSize * t.Key, "terrain");
+				yield return new Renderable(t.Value, Game.CellSize * t.Key, "terrain", Game.CellSize * t.Key.Y);
 		}
 		
 		bool IsIntact(Bridge b)
diff --git a/OpenRA.Mods.RA/Effects/Bullet.cs b/OpenRA.Mods.RA/Effects/Bullet.cs
index 0cf0563774..c3d6dc91ae 100755
--- a/OpenRA.Mods.RA/Effects/Bullet.cs
+++ b/OpenRA.Mods.RA/Effects/Bullet.cs
@@ -134,15 +134,15 @@ namespace OpenRA.Mods.RA.Effects
 				if (Info.High || Info.Angle > 0)
 				{
 					if (Info.Shadow)
-						yield return new Renderable(anim.Image, pos - .5f * anim.Image.size, "shadow");
+						yield return new Renderable(anim.Image, pos - .5f * anim.Image.size, "shadow", (int)pos.Y);
 
 					var highPos = pos - new float2(0, GetAltitude());
 
-					yield return new Renderable(anim.Image, highPos - .5f * anim.Image.size, Args.firedBy.Owner.Palette);
+					yield return new Renderable(anim.Image, highPos - .5f * anim.Image.size, Args.firedBy.Owner.Palette, (int)pos.Y);
 				}
 				else
 					yield return new Renderable(anim.Image, pos - .5f * anim.Image.size,
-						Args.weapon.Underwater ? "shadow" : Args.firedBy.Owner.Palette);
+						Args.weapon.Underwater ? "shadow" : Args.firedBy.Owner.Palette, (int)pos.Y);
 			}
 		}
 
diff --git a/OpenRA.Mods.RA/Effects/Corpse.cs b/OpenRA.Mods.RA/Effects/Corpse.cs
index 665e9b1968..50a2894fa9 100644
--- a/OpenRA.Mods.RA/Effects/Corpse.cs
+++ b/OpenRA.Mods.RA/Effects/Corpse.cs
@@ -35,7 +35,7 @@ namespace OpenRA.Mods.RA.Effects
 
 		public IEnumerable<Renderable> Render()
 		{
-			yield return new Renderable(anim.Image, pos - .5f * anim.Image.size, owner.Palette);
+			yield return new Renderable(anim.Image, pos - .5f * anim.Image.size, owner.Palette, (int)pos.Y);
 		}
 	}
 }
diff --git a/OpenRA.Mods.RA/Effects/CrateEffect.cs b/OpenRA.Mods.RA/Effects/CrateEffect.cs
index cb48a95c42..3fe0b8413b 100644
--- a/OpenRA.Mods.RA/Effects/CrateEffect.cs
+++ b/OpenRA.Mods.RA/Effects/CrateEffect.cs
@@ -42,7 +42,7 @@ namespace OpenRA.Mods.RA.Effects
 		public IEnumerable<Renderable> Render()
 		{
 			yield return new Renderable(anim.Image,
-				a.CenterLocation - .5f * anim.Image.size + offset, "effect");
+				a.CenterLocation - .5f * anim.Image.size + offset, "effect", (int)a.CenterLocation.Y);
 		}
 	}
 }
diff --git a/OpenRA.Mods.RA/Effects/Explosion.cs b/OpenRA.Mods.RA/Effects/Explosion.cs
index 9cbae9eaa1..7c07968c2e 100644
--- a/OpenRA.Mods.RA/Effects/Explosion.cs
+++ b/OpenRA.Mods.RA/Effects/Explosion.cs
@@ -32,7 +32,7 @@ namespace OpenRA.Mods.RA.Effects
 
 		public IEnumerable<Renderable> Render()
 		{
-			yield return new Renderable(anim.Image, pos - .5f * anim.Image.size, "effect");
+			yield return new Renderable(anim.Image, pos - .5f * anim.Image.size, "effect", (int)pos.Y);
 		}
 
 		public Player Owner { get { return null; } }
diff --git a/OpenRA.Mods.RA/Effects/GpsSatellite.cs b/OpenRA.Mods.RA/Effects/GpsSatellite.cs
index 32742f5611..25736ab9ad 100644
--- a/OpenRA.Mods.RA/Effects/GpsSatellite.cs
+++ b/OpenRA.Mods.RA/Effects/GpsSatellite.cs
@@ -38,7 +38,7 @@ namespace OpenRA.Mods.RA.Effects
 		
 		public IEnumerable<Renderable> Render()
 		{
-			yield return new Renderable(anim.Image,offset, "effect");
+			yield return new Renderable(anim.Image,offset, "effect", (int)offset.Y);
 		}
 	}
 }
diff --git a/OpenRA.Mods.RA/Effects/GravityBomb.cs b/OpenRA.Mods.RA/Effects/GravityBomb.cs
index 0b4edc2c6f..5f3424a91c 100755
--- a/OpenRA.Mods.RA/Effects/GravityBomb.cs
+++ b/OpenRA.Mods.RA/Effects/GravityBomb.cs
@@ -54,7 +54,7 @@ namespace OpenRA.Mods.RA.Effects
 		public IEnumerable<Renderable> Render()
 		{
 			yield return new Renderable(anim.Image, 
-				Args.dest - new int2(0, altitude) - .5f * anim.Image.size, "effect");
+				Args.dest - new int2(0, altitude) - .5f * anim.Image.size, "effect", Args.dest.Y);
 		}
 	}
 }
diff --git a/OpenRA.Mods.RA/Effects/Missile.cs b/OpenRA.Mods.RA/Effects/Missile.cs
index 6f5775a7b5..0a0fa0f14a 100755
--- a/OpenRA.Mods.RA/Effects/Missile.cs
+++ b/OpenRA.Mods.RA/Effects/Missile.cs
@@ -123,7 +123,7 @@ namespace OpenRA.Mods.RA.Effects
 
 		public IEnumerable<Renderable> Render()
 		{
-			yield return new Renderable(anim.Image, Pos - 0.5f * anim.Image.size - new float2(0, Altitude), "effect");
+			yield return new Renderable(anim.Image, Pos - 0.5f * anim.Image.size - new float2(0, Altitude), "effect", (int)Pos.Y);
 		}
 	}
 }
diff --git a/OpenRA.Mods.RA/Effects/NukeLaunch.cs b/OpenRA.Mods.RA/Effects/NukeLaunch.cs
index ab060c94aa..da9532432a 100755
--- a/OpenRA.Mods.RA/Effects/NukeLaunch.cs
+++ b/OpenRA.Mods.RA/Effects/NukeLaunch.cs
@@ -82,7 +82,7 @@ namespace OpenRA.Mods.RA.Effects
 
 		public IEnumerable<Renderable> Render()
 		{
-			yield return new Renderable(anim.Image, pos - 0.5f * anim.Image.size - new float2(0, altitude), "effect");
+			yield return new Renderable(anim.Image, pos - 0.5f * anim.Image.size - new float2(0, altitude), "effect", (int)pos.Y);
 		}
 	}
 }
diff --git a/OpenRA.Mods.RA/Effects/SatelliteLaunch.cs b/OpenRA.Mods.RA/Effects/SatelliteLaunch.cs
index 0766ffa28d..ee99372750 100644
--- a/OpenRA.Mods.RA/Effects/SatelliteLaunch.cs
+++ b/OpenRA.Mods.RA/Effects/SatelliteLaunch.cs
@@ -42,7 +42,7 @@ namespace OpenRA.Mods.RA.Effects
 		public IEnumerable<Renderable> Render()
 		{
 			yield return new Renderable(doors.Image,
-				a.CenterLocation - .5f * doors.Image.size + doorOffset, "effect");
+				a.CenterLocation - .5f * doors.Image.size + doorOffset, "effect", (int)doorOffset.Y);
 		}
 	}
 }
diff --git a/OpenRA.Mods.RA/Effects/Smoke.cs b/OpenRA.Mods.RA/Effects/Smoke.cs
index 405aec5f3b..ccb9d3fc4a 100644
--- a/OpenRA.Mods.RA/Effects/Smoke.cs
+++ b/OpenRA.Mods.RA/Effects/Smoke.cs
@@ -35,7 +35,7 @@ namespace OpenRA.Mods.RA.Effects
 
 		public IEnumerable<Renderable> Render()
 		{
-			yield return new Renderable(anim.Image, pos - .5f * anim.Image.size, "effect");
+			yield return new Renderable(anim.Image, pos - .5f * anim.Image.size, "effect", (int)pos.Y);
 		}
 	}
 }
diff --git a/OpenRA.Mods.RA/Effects/TeslaZap.cs b/OpenRA.Mods.RA/Effects/TeslaZap.cs
index aad91a68b3..6cb9d5bfb5 100755
--- a/OpenRA.Mods.RA/Effects/TeslaZap.cs
+++ b/OpenRA.Mods.RA/Effects/TeslaZap.cs
@@ -101,7 +101,7 @@ namespace OpenRA.Mods.RA.Effects
 				var step = steps.Where(t => (to - (z + new float2(t[0],t[1]))).LengthSquared < (to - z).LengthSquared )
 					.OrderBy(t => Math.Abs(float2.Dot(z + new float2(t[0], t[1]), q) + c)).First();
 
-				rs.Add(new Renderable(s.GetSprite(step[4]), z + new float2(step[2], step[3]), "effect"));
+				rs.Add(new Renderable(s.GetSprite(step[4]), z + new float2(step[2], step[3]), "effect", (int)from.Y));
 				z += new float2(step[0], step[1]);
 			}
 
diff --git a/OpenRA.Mods.RA/GainsExperience.cs b/OpenRA.Mods.RA/GainsExperience.cs
index 906d4c01c1..71f5920c8a 100644
--- a/OpenRA.Mods.RA/GainsExperience.cs
+++ b/OpenRA.Mods.RA/GainsExperience.cs
@@ -93,8 +93,8 @@ namespace OpenRA.Mods.RA
 			{
 				RankAnim.Tick();	// hack
 				var bounds = self.GetBounds(true);
-				yield return new Renderable(RankAnim.Image, 
-					new float2(bounds.Right - 6, bounds.Bottom - 8), "effect");
+				yield return new Renderable(RankAnim.Image,
+					new float2(bounds.Right - 6, bounds.Bottom - 8), "effect", (int)self.CenterLocation.Y);
 			}
 		}
 	}
diff --git a/OpenRA.Mods.RA/Render/RenderUnitTurreted.cs b/OpenRA.Mods.RA/Render/RenderUnitTurreted.cs
index c4e187d57b..53b3957b51 100755
--- a/OpenRA.Mods.RA/Render/RenderUnitTurreted.cs
+++ b/OpenRA.Mods.RA/Render/RenderUnitTurreted.cs
@@ -37,7 +37,7 @@ namespace OpenRA.Mods.RA.Render
 				anims.Add( "turret_{0}".F(i), 
 					new AnimationWithOffset( turretAnim,
 						() => Combat.GetTurretPosition( self, facing, turret ),
-						null) { ZOffset = 70 });
+						null));
 
 				if (attackInfo.MuzzleFlash)
 				{