Index: ps/trunk/binaries/data/mods/public/simulation/components/Attack.js
===================================================================
--- ps/trunk/binaries/data/mods/public/simulation/components/Attack.js
+++ ps/trunk/binaries/data/mods/public/simulation/components/Attack.js
@@ -560,6 +560,8 @@
 				predictedPosition = Vector3D.mult(targetVelocity, timeToTarget).add(targetPosition);
 		}
 
+		let predictedHeight = cmpTargetPosition.GetHeightAt(predictedPosition.x, predictedPosition.z);
+
 		// Add inaccuracy based on spread.
 		let distanceModifiedSpread = ApplyValueModificationsToEntity("Attack/Ranged/Spread", +this.template[type].Projectile.Spread, this.entity) *
 			predictedPosition.horizDistanceTo(selfPosition) / 100;
@@ -568,7 +570,7 @@
 		let offsetX = randNorm[0] * distanceModifiedSpread;
 		let offsetZ = randNorm[1] * distanceModifiedSpread;
 
-		let realTargetPosition = new Vector3D(predictedPosition.x + offsetX, targetPosition.y, predictedPosition.z + offsetZ);
+		let realTargetPosition = new Vector3D(predictedPosition.x + offsetX, predictedHeight, predictedPosition.z + offsetZ);
 
 		// Recalculate when the missile will hit the target position.
 		let realHorizDistance = realTargetPosition.horizDistanceTo(selfPosition);
Index: ps/trunk/binaries/data/mods/public/simulation/components/tests/test_Damage.js
===================================================================
--- ps/trunk/binaries/data/mods/public/simulation/components/tests/test_Damage.js
+++ ps/trunk/binaries/data/mods/public/simulation/components/tests/test_Damage.js
@@ -95,6 +95,7 @@
 		"GetPosition": () => targetPos,
 		"GetPreviousPosition": () => targetPos,
 		"GetPosition2D": () => Vector2D.From(targetPos),
+		"GetHeightAt": () => 0,
 		"IsInWorld": () => true,
 	});
 
Index: ps/trunk/source/simulation2/components/CCmpPosition.cpp
===================================================================
--- ps/trunk/source/simulation2/components/CCmpPosition.cpp
+++ ps/trunk/source/simulation2/components/CCmpPosition.cpp
@@ -440,6 +440,11 @@
 
 	virtual entity_pos_t GetHeightFixed() const
 	{
+		return GetHeightAtFixed(m_X, m_Z);
+	}
+
+	virtual entity_pos_t GetHeightAtFixed(entity_pos_t x, entity_pos_t z) const
+	{
 		if (!m_RelativeToGround)
 			return m_Y;
 		// relative to the ground, so the fixed height = ground height + m_Y
@@ -447,13 +452,13 @@
 		entity_pos_t baseY;
 		CmpPtr<ICmpTerrain> cmpTerrain(GetSystemEntity());
 		if (cmpTerrain)
-			baseY = cmpTerrain->GetGroundLevel(m_X, m_Z);
+			baseY = cmpTerrain->GetGroundLevel(x, z);
 
 		if (m_Floating)
 		{
 			CmpPtr<ICmpWaterManager> cmpWaterManager(GetSystemEntity());
 			if (cmpWaterManager)
-				baseY = std::max(baseY, cmpWaterManager->GetWaterLevel(m_X, m_Z) - m_FloatDepth);
+				baseY = std::max(baseY, cmpWaterManager->GetWaterLevel(x, z) - m_FloatDepth);
 		}
 		return m_Y + baseY;
 	}
@@ -525,7 +530,7 @@
 			return CFixedVector3D();
 		}
 
-		return CFixedVector3D(m_PrevX, GetHeightFixed(), m_PrevZ);
+		return CFixedVector3D(m_PrevX, GetHeightAtFixed(m_PrevX, m_PrevZ), m_PrevZ);
 	}
 
 	virtual CFixedVector2D GetPreviousPosition2D() const
Index: ps/trunk/source/simulation2/components/ICmpPosition.h
===================================================================
--- ps/trunk/source/simulation2/components/ICmpPosition.h
+++ ps/trunk/source/simulation2/components/ICmpPosition.h
@@ -121,11 +121,17 @@
 	virtual void SetHeightFixed(entity_pos_t y) = 0;
 
 	/**
-	 * Returns the vertical offset above the map zero point
+	 * Returns the current vertical offset above above the map zero point.
 	 */
 	virtual entity_pos_t GetHeightFixed() const = 0;
 
 	/**
+	 * Returns the vertical offset above above the map zero point
+	 * the unit would have at the given position.
+	 */
+	virtual entity_pos_t GetHeightAtFixed(entity_pos_t x, entity_pos_t z) const = 0;
+
+	/**
 	 * Returns true iff the entity will follow the terrain height (possibly with an offset)
 	 */
 	virtual bool IsHeightRelative() const = 0;
Index: ps/trunk/source/simulation2/components/ICmpPosition.cpp
===================================================================
--- ps/trunk/source/simulation2/components/ICmpPosition.cpp
+++ ps/trunk/source/simulation2/components/ICmpPosition.cpp
@@ -32,7 +32,7 @@
 DEFINE_INTERFACE_METHOD_1("SetHeightOffset", void, ICmpPosition, SetHeightOffset, entity_pos_t)
 DEFINE_INTERFACE_METHOD_CONST_0("GetHeightOffset", entity_pos_t, ICmpPosition, GetHeightOffset)
 DEFINE_INTERFACE_METHOD_1("SetHeightFixed", void, ICmpPosition, SetHeightFixed, entity_pos_t)
-DEFINE_INTERFACE_METHOD_CONST_0("GetHeightFixed", entity_pos_t, ICmpPosition, GetHeightFixed)
+DEFINE_INTERFACE_METHOD_CONST_2("GetHeightAt", entity_pos_t, ICmpPosition, GetHeightAtFixed, entity_pos_t, entity_pos_t)
 DEFINE_INTERFACE_METHOD_CONST_0("IsHeightRelative", bool, ICmpPosition, IsHeightRelative)
 DEFINE_INTERFACE_METHOD_1("SetHeightRelative", void, ICmpPosition, SetHeightRelative, bool)
 DEFINE_INTERFACE_METHOD_CONST_0("CanFloat", bool, ICmpPosition, CanFloat)
Index: ps/trunk/source/simulation2/components/tests/test_RangeManager.h
===================================================================
--- ps/trunk/source/simulation2/components/tests/test_RangeManager.h
+++ ps/trunk/source/simulation2/components/tests/test_RangeManager.h
@@ -52,6 +52,7 @@
 	virtual entity_pos_t GetHeightOffset() const { return entity_pos_t::Zero(); }
 	virtual void SetHeightFixed(entity_pos_t UNUSED(y)) { }
 	virtual entity_pos_t GetHeightFixed() const { return entity_pos_t::Zero(); }
+	virtual entity_pos_t GetHeightAtFixed(entity_pos_t, entity_pos_t) const { return entity_pos_t::Zero(); }
 	virtual bool IsHeightRelative() const { return true; }
 	virtual void SetHeightRelative(bool UNUSED(relative)) { }
 	virtual bool CanFloat() const { return false; }