diff --git a/OpenRA.Game/OpenRA.Game.csproj b/OpenRA.Game/OpenRA.Game.csproj
index ad5a320dcc..bb9a09f303 100644
--- a/OpenRA.Game/OpenRA.Game.csproj
+++ b/OpenRA.Game/OpenRA.Game.csproj
@@ -191,7 +191,6 @@
     <Compile Include="Graphics\VoxelRenderer.cs" />
     <Compile Include="Graphics\VoxelLoader.cs" />
     <Compile Include="Graphics\VoxelProvider.cs" />
-    <Compile Include="Traits\BodyOrientation.cs" />
     <Compile Include="Graphics\VoxelAnimation.cs" />
     <Compile Include="Traits\Player\FrozenActorLayer.cs" />
     <Compile Include="Graphics\Theater.cs" />
diff --git a/OpenRA.Game/Traits/TraitsInterfaces.cs b/OpenRA.Game/Traits/TraitsInterfaces.cs
index cb97e131c3..00526d6d00 100644
--- a/OpenRA.Game/Traits/TraitsInterfaces.cs
+++ b/OpenRA.Game/Traits/TraitsInterfaces.cs
@@ -308,22 +308,6 @@ namespace OpenRA.Traits
 
 	public interface IPostRenderSelection { IEnumerable<IRenderable> RenderAfterWorld(WorldRenderer wr); }
 
-	public interface IBodyOrientation
-	{
-		WAngle CameraPitch { get; }
-		int QuantizedFacings { get; }
-		WVec LocalToWorld(WVec vec);
-		WRot QuantizeOrientation(Actor self, WRot orientation);
-	}
-
-	public interface IBodyOrientationInfo : ITraitInfo
-	{
-		WVec LocalToWorld(WVec vec);
-		WRot QuantizeOrientation(WRot orientation, int facings);
-	}
-
-	public interface IQuantizeBodyOrientationInfo { int QuantizedBodyFacings(ActorInfo ai, SequenceProvider sequenceProvider, string faction); }
-
 	public interface ITargetableInfo
 	{
 		string[] GetTargetTypes();
diff --git a/OpenRA.Mods.Cnc/Traits/Render/WithGunboatBody.cs b/OpenRA.Mods.Cnc/Traits/Render/WithGunboatBody.cs
index a03e44246e..41a162ac47 100644
--- a/OpenRA.Mods.Cnc/Traits/Render/WithGunboatBody.cs
+++ b/OpenRA.Mods.Cnc/Traits/Render/WithGunboatBody.cs
@@ -27,11 +27,6 @@ namespace OpenRA.Mods.Cnc.Traits
 		[SequenceReference] public readonly string WakeRightSequence = "wake-right";
 
 		public override object Create(ActorInitializer init) { return new WithGunboatBody(init, this); }
-
-		public override int QuantizedBodyFacings(ActorInfo ai, SequenceProvider sequenceProvider, string faction)
-		{
-			return 2;
-		}
 	}
 
 	class WithGunboatBody : WithSpriteBody, ITick
diff --git a/OpenRA.Mods.Common/Effects/Contrail.cs b/OpenRA.Mods.Common/Effects/Contrail.cs
index c5c54df60b..aba9a1d131 100644
--- a/OpenRA.Mods.Common/Effects/Contrail.cs
+++ b/OpenRA.Mods.Common/Effects/Contrail.cs
@@ -12,6 +12,7 @@ using System.Collections.Generic;
 using System.Drawing;
 using OpenRA.Graphics;
 using OpenRA.Mods.Common.Graphics;
+using OpenRA.Mods.Common.Traits;
 using OpenRA.Traits;
 
 namespace OpenRA.Mods.Common.Effects
diff --git a/OpenRA.Mods.Common/OpenRA.Mods.Common.csproj b/OpenRA.Mods.Common/OpenRA.Mods.Common.csproj
index 9bf8805b53..3314d73807 100644
--- a/OpenRA.Mods.Common/OpenRA.Mods.Common.csproj
+++ b/OpenRA.Mods.Common/OpenRA.Mods.Common.csproj
@@ -398,6 +398,8 @@
     <Compile Include="Traits\ProvidesRadar.cs" />
     <Compile Include="Traits\ProximityCaptor.cs" />
     <Compile Include="Traits\ProximityCapturable.cs" />
+    <Compile Include="Traits\BodyOrientation.cs" />
+    <Compile Include="Traits\QuantizeFacingsFromSequence.cs" />
     <Compile Include="Traits\RadarColorFromTerrain.cs" />
     <Compile Include="Traits\Render\AutoSelectionSize.cs" />
     <Compile Include="Traits\Render\Hovers.cs" />
diff --git a/OpenRA.Game/Traits/BodyOrientation.cs b/OpenRA.Mods.Common/Traits/BodyOrientation.cs
similarity index 83%
rename from OpenRA.Game/Traits/BodyOrientation.cs
rename to OpenRA.Mods.Common/Traits/BodyOrientation.cs
index 54afb6dbd8..39c47652a3 100644
--- a/OpenRA.Game/Traits/BodyOrientation.cs
+++ b/OpenRA.Mods.Common/Traits/BodyOrientation.cs
@@ -9,8 +9,11 @@
 #endregion
 
 using System;
+using System.Collections.Generic;
+using System.Linq;
+using OpenRA.Traits;
 
-namespace OpenRA.Traits
+namespace OpenRA.Mods.Common.Traits
 {
 	public class BodyOrientationInfo : ITraitInfo, IBodyOrientationInfo
 	{
@@ -70,8 +73,12 @@ namespace OpenRA.Traits
 					return info.QuantizedFacings;
 
 				var qboi = self.Info.Traits.GetOrDefault<IQuantizeBodyOrientationInfo>();
-				if (qboi == null)
-					throw new InvalidOperationException("Actor type '" + self.Info.Name + "' does not define a quantized body orientation.");
+				var isb = self.HasTrait<ISpriteBody>();
+
+				// If a sprite actor has neither custom QuantizedFacings nor a trait implementing IQuantizeBodyOrientationInfo, throw
+				if (qboi == null && isb)
+					throw new InvalidOperationException("Actor" + self.Info.Name + "has a sprite body but no facing quantization."
+						+ " Either add the QuantizeFacingsFromSequence trait or set custom QuantizedFacings on BodyOrientation.");
 
 				return qboi.QuantizedBodyFacings(self.Info, self.World.Map.SequenceProvider, faction);
 			});
diff --git a/OpenRA.Mods.Common/Traits/QuantizeFacingsFromSequence.cs b/OpenRA.Mods.Common/Traits/QuantizeFacingsFromSequence.cs
new file mode 100644
index 0000000000..93c10dab09
--- /dev/null
+++ b/OpenRA.Mods.Common/Traits/QuantizeFacingsFromSequence.cs
@@ -0,0 +1,43 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007-2015 The OpenRA Developers (see AUTHORS)
+ * This file is part of OpenRA, which is free software. It is made
+ * available to you under the terms of the GNU General Public License
+ * as published by the Free Software Foundation. For more information,
+ * see COPYING.
+ */
+#endregion
+
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using OpenRA.Graphics;
+using OpenRA.Mods.Common.Graphics;
+using OpenRA.Traits;
+
+namespace OpenRA.Mods.Common.Traits
+{
+	[Desc("Derive facings from sprite body sequence.")]
+	public class QuantizeFacingsFromSequenceInfo : UpgradableTraitInfo, IQuantizeBodyOrientationInfo, Requires<RenderSpritesInfo>
+	{
+		[Desc("Defines sequence to derive facings from."), SequenceReference]
+		public readonly string Sequence = "idle";
+
+		public int QuantizedBodyFacings(ActorInfo ai, SequenceProvider sequenceProvider, string race)
+		{
+			if (string.IsNullOrEmpty(Sequence))
+				throw new InvalidOperationException("Actor " + ai.Name + " is missing sequence to quantize facings from.");
+
+			var rsi = ai.Traits.Get<RenderSpritesInfo>();
+			return sequenceProvider.GetSequence(rsi.GetImage(ai, sequenceProvider, race), Sequence).Facings;
+		}
+
+		public override object Create(ActorInitializer init) { return new QuantizeFacingsFromSequence(this); }
+	}
+
+	public class QuantizeFacingsFromSequence : UpgradableTrait<QuantizeFacingsFromSequenceInfo>
+	{
+		public QuantizeFacingsFromSequence(QuantizeFacingsFromSequenceInfo info)
+			: base(info) { }
+	}
+}
diff --git a/OpenRA.Mods.Common/Traits/Render/RenderSimple.cs b/OpenRA.Mods.Common/Traits/Render/RenderSimple.cs
index 311b4cf1e3..5bcdd33c73 100644
--- a/OpenRA.Mods.Common/Traits/Render/RenderSimple.cs
+++ b/OpenRA.Mods.Common/Traits/Render/RenderSimple.cs
@@ -17,7 +17,7 @@ using OpenRA.Traits;
 namespace OpenRA.Mods.Common.Traits
 {
 	[Desc("Basic render trait for immobile actors. Deprecated, use RenderSprites + WithSpriteBody instead.")]
-	public class RenderSimpleInfo : RenderSpritesInfo, IRenderActorPreviewSpritesInfo, IQuantizeBodyOrientationInfo, Requires<IBodyOrientationInfo>
+	public class RenderSimpleInfo : RenderSpritesInfo, IRenderActorPreviewSpritesInfo, Requires<IBodyOrientationInfo>
 	{
 		[SequenceReference] public readonly string Sequence = "idle";
 
@@ -33,11 +33,6 @@ namespace OpenRA.Mods.Common.Traits
 
 			yield return new SpriteActorPreview(anim, WVec.Zero, 0, p, rs.Scale);
 		}
-
-		public virtual int QuantizedBodyFacings(ActorInfo ai, SequenceProvider sequenceProvider, string faction)
-		{
-			return sequenceProvider.GetSequence(GetImage(ai, sequenceProvider, faction), Sequence).Facings;
-		}
 	}
 
 	public class RenderSimple : RenderSprites, IAutoSelectionSize
diff --git a/OpenRA.Mods.Common/Traits/Render/WithCrateBody.cs b/OpenRA.Mods.Common/Traits/Render/WithCrateBody.cs
index 523f20e399..7f392a5365 100644
--- a/OpenRA.Mods.Common/Traits/Render/WithCrateBody.cs
+++ b/OpenRA.Mods.Common/Traits/Render/WithCrateBody.cs
@@ -18,7 +18,7 @@ using OpenRA.Traits;
 namespace OpenRA.Mods.Common.Traits
 {
 	[Desc("Renders crates with both water and land variants.")]
-	class WithCrateBodyInfo : ITraitInfo, Requires<RenderSpritesInfo>, IQuantizeBodyOrientationInfo, IRenderActorPreviewSpritesInfo
+	class WithCrateBodyInfo : ITraitInfo, Requires<RenderSpritesInfo>, IRenderActorPreviewSpritesInfo
 	{
 		[Desc("Easteregg sequences to use in december.")]
 		public readonly string[] XmasImages = { };
@@ -35,8 +35,6 @@ namespace OpenRA.Mods.Common.Traits
 			anim.PlayRepeating(RenderSprites.NormalizeSequence(anim, init.GetDamageState(), IdleSequence));
 			yield return new SpriteActorPreview(anim, WVec.Zero, 0, p, rs.Scale);
 		}
-
-		public int QuantizedBodyFacings(ActorInfo ai, SequenceProvider sequenceProvider, string faction) { return 1; }
 	}
 
 	class WithCrateBody : INotifyParachuteLanded
diff --git a/OpenRA.Mods.Common/Traits/Render/WithFacingSpriteBody.cs b/OpenRA.Mods.Common/Traits/Render/WithFacingSpriteBody.cs
index d1c9132d32..7f5f9e2dfb 100644
--- a/OpenRA.Mods.Common/Traits/Render/WithFacingSpriteBody.cs
+++ b/OpenRA.Mods.Common/Traits/Render/WithFacingSpriteBody.cs
@@ -30,12 +30,6 @@ namespace OpenRA.Mods.Common.Traits
 
 			yield return new SpriteActorPreview(anim, WVec.Zero, 0, p, rs.Scale);
 		}
-
-		public override int QuantizedBodyFacings(ActorInfo ai, SequenceProvider sequenceProvider, string faction)
-		{
-			var rsi = ai.Traits.Get<RenderSpritesInfo>();
-			return sequenceProvider.GetSequence(rsi.GetImage(ai, sequenceProvider, faction), Sequence).Facings;
-		}
 	}
 
 	public class WithFacingSpriteBody : WithSpriteBody
diff --git a/OpenRA.Mods.Common/Traits/Render/WithInfantryBody.cs b/OpenRA.Mods.Common/Traits/Render/WithInfantryBody.cs
index 4ba38ac7d8..23d97a0b7b 100644
--- a/OpenRA.Mods.Common/Traits/Render/WithInfantryBody.cs
+++ b/OpenRA.Mods.Common/Traits/Render/WithInfantryBody.cs
@@ -16,8 +16,7 @@ using OpenRA.Traits;
 
 namespace OpenRA.Mods.Common.Traits
 {
-	public class WithInfantryBodyInfo : UpgradableTraitInfo, IQuantizeBodyOrientationInfo, IRenderActorPreviewSpritesInfo,
-		Requires<IMoveInfo>, Requires<RenderSpritesInfo>
+	public class WithInfantryBodyInfo : UpgradableTraitInfo, IRenderActorPreviewSpritesInfo, Requires<IMoveInfo>, Requires<RenderSpritesInfo>
 	{
 		public readonly int MinIdleWaitTicks = 30;
 		public readonly int MaxIdleWaitTicks = 110;
@@ -40,12 +39,6 @@ namespace OpenRA.Mods.Common.Traits
 			anim.PlayRepeating(RenderSprites.NormalizeSequence(anim, init.GetDamageState(), StandSequences.First()));
 			yield return new SpriteActorPreview(anim, WVec.Zero, 0, p, rs.Scale);
 		}
-
-		public int QuantizedBodyFacings(ActorInfo ai, SequenceProvider sequenceProvider, string faction)
-		{
-			var rsi = ai.Traits.Get<RenderSpritesInfo>();
-			return sequenceProvider.GetSequence(rsi.GetImage(ai, sequenceProvider, faction), StandSequences.First()).Facings;
-		}
 	}
 
 	public class WithInfantryBody : UpgradableTrait<WithInfantryBodyInfo>, ITick, INotifyAttack, INotifyIdle, INotifyCreated
diff --git a/OpenRA.Mods.Common/Traits/Render/WithSpriteBody.cs b/OpenRA.Mods.Common/Traits/Render/WithSpriteBody.cs
index 838b02faad..c4861111ce 100644
--- a/OpenRA.Mods.Common/Traits/Render/WithSpriteBody.cs
+++ b/OpenRA.Mods.Common/Traits/Render/WithSpriteBody.cs
@@ -17,8 +17,7 @@ using OpenRA.Traits;
 namespace OpenRA.Mods.Common.Traits
 {
 	[Desc("Default trait for rendering sprite-based actors.")]
-	public class WithSpriteBodyInfo : UpgradableTraitInfo, IRenderActorPreviewSpritesInfo, IQuantizeBodyOrientationInfo,
-		Requires<RenderSpritesInfo>
+	public class WithSpriteBodyInfo : UpgradableTraitInfo, IRenderActorPreviewSpritesInfo, Requires<RenderSpritesInfo>
 	{
 		[Desc("Animation to play when the actor is created.")]
 		[SequenceReference] public readonly string StartSequence = null;
@@ -35,11 +34,6 @@ namespace OpenRA.Mods.Common.Traits
 
 			yield return new SpriteActorPreview(anim, WVec.Zero, 0, p, rs.Scale);
 		}
-
-		public virtual int QuantizedBodyFacings(ActorInfo ai, SequenceProvider sequenceProvider, string faction)
-		{
-			return 1;
-		}
 	}
 
 	public class WithSpriteBody : UpgradableTrait<WithSpriteBodyInfo>, ISpriteBody, INotifyDamageStateChanged
diff --git a/OpenRA.Mods.Common/Traits/Render/WithVoxelBody.cs b/OpenRA.Mods.Common/Traits/Render/WithVoxelBody.cs
index 3926876452..7cd11fa474 100644
--- a/OpenRA.Mods.Common/Traits/Render/WithVoxelBody.cs
+++ b/OpenRA.Mods.Common/Traits/Render/WithVoxelBody.cs
@@ -18,7 +18,7 @@ using OpenRA.Traits;
 namespace OpenRA.Mods.Common.Traits
 {
 	[Desc("Also returns a default selection size that is calculated automatically from the voxel dimensions.")]
-	public class WithVoxelBodyInfo : ITraitInfo, IQuantizeBodyOrientationInfo, IRenderActorPreviewVoxelsInfo, Requires<RenderVoxelsInfo>
+	public class WithVoxelBodyInfo : ITraitInfo, IRenderActorPreviewVoxelsInfo, Requires<RenderVoxelsInfo>
 	{
 		public readonly string Sequence = "idle";
 
@@ -33,8 +33,6 @@ namespace OpenRA.Mods.Common.Traits
 				() => bodyOrientation,
 				() => false, () => 0);
 		}
-
-		public int QuantizedBodyFacings(ActorInfo ai, SequenceProvider sequenceProvider, string faction) { return 0; }
 	}
 
 	public class WithVoxelBody : IAutoSelectionSize
diff --git a/OpenRA.Mods.Common/TraitsInterfaces.cs b/OpenRA.Mods.Common/TraitsInterfaces.cs
index b8918172d3..90de79ea57 100644
--- a/OpenRA.Mods.Common/TraitsInterfaces.cs
+++ b/OpenRA.Mods.Common/TraitsInterfaces.cs
@@ -25,6 +25,25 @@ namespace OpenRA.Mods.Common.Traits
 		void PlayCustomAnimationBackwards(Actor self, string name, Action after);
 	}
 
+	public interface IBodyOrientation
+	{
+		WAngle CameraPitch { get; }
+		int QuantizedFacings { get; }
+		WVec LocalToWorld(WVec vec);
+		WRot QuantizeOrientation(Actor self, WRot orientation);
+	}
+
+	public interface IBodyOrientationInfo : ITraitInfo
+	{
+		WVec LocalToWorld(WVec vec);
+		WRot QuantizeOrientation(WRot orientation, int facings);
+	}
+
+	public interface IQuantizeBodyOrientationInfo : ITraitInfo
+	{
+		int QuantizedBodyFacings(ActorInfo ai, SequenceProvider sequenceProvider, string race);
+	}
+
 	public interface INotifyResourceClaimLost
 	{
 		void OnNotifyResourceClaimLost(Actor self, ResourceClaim claim, Actor claimer);
diff --git a/OpenRA.Mods.TS/Traits/Render/WithVoxelUnloadBody.cs b/OpenRA.Mods.TS/Traits/Render/WithVoxelUnloadBody.cs
index 67610f4da5..0c4e8b14b3 100644
--- a/OpenRA.Mods.TS/Traits/Render/WithVoxelUnloadBody.cs
+++ b/OpenRA.Mods.TS/Traits/Render/WithVoxelUnloadBody.cs
@@ -18,7 +18,7 @@ using OpenRA.Traits;
 
 namespace OpenRA.Mods.TS.Traits
 {
-	public class WithVoxelUnloadBodyInfo : ITraitInfo, IQuantizeBodyOrientationInfo, IRenderActorPreviewVoxelsInfo, Requires<RenderVoxelsInfo>
+	public class WithVoxelUnloadBodyInfo : ITraitInfo, IRenderActorPreviewVoxelsInfo, Requires<RenderVoxelsInfo>
 	{
 		[Desc("Voxel sequence name to use when docked to a refinery.")]
 		public readonly string UnloadSequence = "unload";
@@ -36,8 +36,6 @@ namespace OpenRA.Mods.TS.Traits
 				() => new[] { body.QuantizeOrientation(orientation, facings) },
 				() => false, () => 0);
 		}
-
-		public int QuantizedBodyFacings(ActorInfo ai, SequenceProvider sequenceProvider, string faction) { return 0; }
 	}
 
 	public class WithVoxelUnloadBody : IAutoSelectionSize
diff --git a/OpenRA.Mods.TS/Traits/Render/WithVoxelWalkerBody.cs b/OpenRA.Mods.TS/Traits/Render/WithVoxelWalkerBody.cs
index e3e27e0a09..adb4682911 100644
--- a/OpenRA.Mods.TS/Traits/Render/WithVoxelWalkerBody.cs
+++ b/OpenRA.Mods.TS/Traits/Render/WithVoxelWalkerBody.cs
@@ -16,12 +16,10 @@ using OpenRA.Traits;
 
 namespace OpenRA.Mods.TS.Traits
 {
-	public class WithVoxelWalkerBodyInfo : ITraitInfo, IQuantizeBodyOrientationInfo, Requires<RenderVoxelsInfo>, Requires<IMoveInfo>
+	public class WithVoxelWalkerBodyInfo : ITraitInfo, Requires<RenderVoxelsInfo>, Requires<IMoveInfo>
 	{
 		public readonly int TickRate = 5;
 		public object Create(ActorInitializer init) { return new WithVoxelWalkerBody(init.Self, this); }
-
-		public int QuantizedBodyFacings(ActorInfo ai, SequenceProvider sequenceProvider, string faction) { return 0; }
 	}
 
 	public class WithVoxelWalkerBody : IAutoSelectionSize, ITick
diff --git a/OpenRA.Mods.TS/Traits/Render/WithVoxelWaterBody.cs b/OpenRA.Mods.TS/Traits/Render/WithVoxelWaterBody.cs
index 387756235a..933e146cb3 100644
--- a/OpenRA.Mods.TS/Traits/Render/WithVoxelWaterBody.cs
+++ b/OpenRA.Mods.TS/Traits/Render/WithVoxelWaterBody.cs
@@ -18,7 +18,7 @@ using OpenRA.Traits;
 
 namespace OpenRA.Mods.TS.Traits
 {
-	public class WithVoxelWaterBodyInfo : ITraitInfo, IQuantizeBodyOrientationInfo, IRenderActorPreviewVoxelsInfo, Requires<RenderVoxelsInfo>
+	public class WithVoxelWaterBodyInfo : ITraitInfo, IRenderActorPreviewVoxelsInfo, Requires<RenderVoxelsInfo>
 	{
 		public readonly string WaterSequence = "water";
 		public readonly string LandSequence = "idle";
@@ -41,8 +41,6 @@ namespace OpenRA.Mods.TS.Traits
 				() => new[] { body.QuantizeOrientation(orientation, facings) },
 				() => false, () => 0);
 		}
-
-		public int QuantizedBodyFacings(ActorInfo ai, SequenceProvider sequenceProvider, string faction) { return 0; }
 	}
 
 	public class WithVoxelWaterBody : IAutoSelectionSize