Support additional render damage states for buildings.

OpenRA.Game/Traits/Render/RenderSimple.cs

@@ -55,13 +55,9 @@ namespace OpenRA.Traits
 				.FirstOrDefault();
 		}
 
-		public virtual string NormalizeSequence(Actor self, string baseSequence)
+		public string NormalizeSequence(Actor self, string baseSequence)
 		{
-			string damageState = self.GetDamageState() >= DamageState.Heavy ? "damaged-" : "";
+			return NormalizeSequence(anim, self.GetDamageState(), baseSequence);
-			if (anim.HasSequence(damageState + baseSequence))
-				return damageState + baseSequence;
-			else
-				return baseSequence;
 		}
 
 		public void PlayCustomAnim(Actor self, string name)

OpenRA.Game/Traits/Render/RenderSprites.cs

@@ -100,5 +100,21 @@ namespace OpenRA.Traits
 				a.Animation.Tick();
 		}
 
+		public static string NormalizeSequence(Animation anim, DamageState state, string baseSequence)
+		{
+			var states = new Pair<DamageState, string>[]
+			{
+				Pair.New(DamageState.Critical, "critical-"),
+				Pair.New(DamageState.Heavy, "damaged-"),
+				Pair.New(DamageState.Medium, "scratched-"),
+				Pair.New(DamageState.Light, "scuffed-")
+			};
+
+			foreach (var s in states)
+				if (state >= s.First && anim.HasSequence(s.Second+baseSequence))
+				    return s.Second+baseSequence;
+
+			return baseSequence;
+		}
 	}
 }