diff --git a/OpenRA.Mods.Common/Projectiles/Missile.cs b/OpenRA.Mods.Common/Projectiles/Missile.cs
index 1513fe2eda..cbfe64e305 100644
--- a/OpenRA.Mods.Common/Projectiles/Missile.cs
+++ b/OpenRA.Mods.Common/Projectiles/Missile.cs
@@ -61,6 +61,9 @@ namespace OpenRA.Mods.Common.Projectiles
 		[Desc("Is the missile blocked by actors with BlocksProjectiles: trait.")]
 		public readonly bool Blockable = true;
 
+		[Desc("Is the missile aware of terrain height levels. Only needed for mods with real, non-visual height levels.")]
+		public readonly bool TerrainHeightAware = false;
+
 		[Desc("Width of projectile (used for finding blocking actors).")]
 		public readonly WDist Width = new WDist(1);
 
@@ -317,14 +320,19 @@ namespace OpenRA.Mods.Common.Projectiles
 			var tarDistVec = targetPosition + offset - pos;
 			var relTarHorDist = tarDistVec.HorizontalLength;
 
-			int predClfHgt, predClfDist, lastHtChg, lastHt;
-			InclineLookahead(world, relTarHorDist, out predClfHgt, out predClfDist, out lastHtChg, out lastHt);
+			int predClfHgt = 0;
+			int predClfDist = 0;
+			int lastHtChg = 0;
+			int lastHt = 0;
+
+			if (info.TerrainHeightAware)
+				InclineLookahead(world, relTarHorDist, out predClfHgt, out predClfDist, out lastHtChg, out lastHt);
 
 			// Height difference between the incline height and missile height
 			var diffClfMslHgt = predClfHgt - pos.Z;
 
 			// Incline coming up
-			if (diffClfMslHgt >= 0 && predClfDist > 0)
+			if (info.TerrainHeightAware && diffClfMslHgt >= 0 && predClfDist > 0)
 				DetermineLaunchSpeedAndAngleForIncline(predClfDist, diffClfMslHgt, relTarHorDist, out speed, out vFacing);
 			else if (lastHt != 0)
 			{
@@ -559,7 +567,7 @@ namespace OpenRA.Mods.Common.Projectiles
 			// the missile hasn't been fired near a cliff) is simply finding the smallest
 			// vertical facing that allows for a smooth climb to the new terrain's height
 			// and coming in at predClfDist at exactly zero vertical facing
-			if (diffClfMslHgt >= 0 && !allowPassBy)
+			if (info.TerrainHeightAware && diffClfMslHgt >= 0 && !allowPassBy)
 				desiredVFacing = IncreaseAltitude(predClfDist, diffClfMslHgt, relTarHorDist, vFacing);
 			else if (relTarHorDist <= 3 * loopRadius || state == States.Hitting)
 			{
@@ -645,7 +653,7 @@ namespace OpenRA.Mods.Common.Projectiles
 						else
 						{
 							// Avoid the cliff edge
-							if (edgeVector.Length > loopRadius && lastHt > targetPosition.Z)
+							if (info.TerrainHeightAware && edgeVector.Length > loopRadius && lastHt > targetPosition.Z)
 							{
 								int vFac;
 								for (vFac = vFacing + 1; vFac <= vFacing + info.VerticalRateOfTurn - 1; vFac++)
@@ -718,8 +726,13 @@ namespace OpenRA.Mods.Common.Projectiles
 
 		WVec HomingTick(World world, WVec tarDistVec, int relTarHorDist)
 		{
-			int predClfHgt, predClfDist, lastHtChg, lastHt;
-			InclineLookahead(world, relTarHorDist, out predClfHgt, out predClfDist, out lastHtChg, out lastHt);
+			int predClfHgt = 0;
+			int predClfDist = 0;
+			int lastHtChg = 0;
+			int lastHt = 0;
+
+			if (info.TerrainHeightAware)
+				InclineLookahead(world, relTarHorDist, out predClfHgt, out predClfDist, out lastHtChg, out lastHt);
 
 			// Height difference between the incline height and missile height
 			var diffClfMslHgt = predClfHgt - pos.Z;