diff --git a/OpenRA.Mods.Common/Lint/CheckRevealFootprint.cs b/OpenRA.Mods.Common/Lint/CheckRevealFootprint.cs
index 682822542c..afcc5b96a4 100644
--- a/OpenRA.Mods.Common/Lint/CheckRevealFootprint.cs
+++ b/OpenRA.Mods.Common/Lint/CheckRevealFootprint.cs
@@ -28,7 +28,7 @@ namespace OpenRA.Mods.Common.Lint
 				var ios = actorInfo.Value.TraitInfoOrDefault<IOccupySpaceInfo>();
 				foreach (var rsi in actorInfo.Value.TraitInfos<RevealsShroudInfo>())
 				{
-					if (rsi.Type == VisibilityType.CenterPosition)
+					if (rsi.Type != VisibilityType.Footprint)
 						continue;
 
 					if (ios == null)
diff --git a/OpenRA.Mods.Common/Traits/AffectsShroud.cs b/OpenRA.Mods.Common/Traits/AffectsShroud.cs
index 8e8fd93966..f5e1f71741 100644
--- a/OpenRA.Mods.Common/Traits/AffectsShroud.cs
+++ b/OpenRA.Mods.Common/Traits/AffectsShroud.cs
@@ -53,7 +53,11 @@ namespace OpenRA.Mods.Common.Traits
 					.SelectMany(kv => Shroud.ProjectedCellsInRange(map, kv.First, range, Info.MaxHeightDelta))
 					.Distinct().ToArray();
 
-			return Shroud.ProjectedCellsInRange(map, self.CenterPosition, range, Info.MaxHeightDelta)
+			var pos = self.CenterPosition;
+			if (Info.Type == VisibilityType.GroundPosition)
+				pos -= new WVec(WDist.Zero, WDist.Zero, self.World.Map.DistanceAboveTerrain(pos));
+
+			return Shroud.ProjectedCellsInRange(map, pos, range, Info.MaxHeightDelta)
 				.ToArray();
 		}
 
diff --git a/OpenRA.Mods.Common/Traits/Modifiers/HiddenUnderShroud.cs b/OpenRA.Mods.Common/Traits/Modifiers/HiddenUnderShroud.cs
index 5234ce7e4d..bbedbcfc7c 100644
--- a/OpenRA.Mods.Common/Traits/Modifiers/HiddenUnderShroud.cs
+++ b/OpenRA.Mods.Common/Traits/Modifiers/HiddenUnderShroud.cs
@@ -15,7 +15,7 @@ using OpenRA.Traits;
 
 namespace OpenRA.Mods.Common.Traits
 {
-	public enum VisibilityType { Footprint, CenterPosition }
+	public enum VisibilityType { Footprint, CenterPosition, GroundPosition }
 
 	[Desc("The actor stays invisible under the shroud.")]
 	public class HiddenUnderShroudInfo : ITraitInfo, IDefaultVisibilityInfo