diff --git a/OpenRA.Mods.RA/ShroudRenderer.cs b/OpenRA.Mods.RA/ShroudRenderer.cs
index c3820479c5..f6de9030de 100644
--- a/OpenRA.Mods.RA/ShroudRenderer.cs
+++ b/OpenRA.Mods.RA/ShroudRenderer.cs
@@ -8,6 +8,7 @@
  */
 #endregion
 
+using System;
 using System.Drawing;
 using System.Linq;
 using OpenRA;
@@ -19,7 +20,8 @@ namespace OpenRA.Mods.RA
 	public class ShroudRendererInfo : ITraitInfo
 	{
 		public readonly string Sequence = "shroud";
-		public readonly string[] Variants = new[] { "shroud" };
+		public readonly string[] ShroudVariants = new[] { "shroud" };
+		public readonly string[] FogVariants = new[] { "fog" };
 
 		public readonly string ShroudPalette = "shroud";
 		public readonly string FogPalette = "fog";
@@ -31,8 +33,14 @@ namespace OpenRA.Mods.RA
 		[Desc("Use the upper four bits when calculating frame")]
 		public readonly bool UseExtendedIndex = false;
 
-		[Desc("Palette index for synthesized unexplored tile")]
-		public readonly int ShroudColor = 12;
+		[Desc("Override for source art that doesn't define a fully shrouded tile")]
+		public readonly string OverrideFullShroud = null;
+		public readonly int OverrideShroudIndex = 15;
+
+		[Desc("Override for source art that doesn't define a fully fogged tile")]
+		public readonly string OverrideFullFog = null;
+		public readonly int OverrideFogIndex = 15;
+
 		public readonly BlendMode ShroudBlend = BlendMode.Alpha;
 		public object Create(ActorInitializer init) { return new ShroudRenderer(init.world, this); }
 	}
@@ -57,8 +65,7 @@ namespace OpenRA.Mods.RA
 		}
 
 		readonly ShroudRendererInfo info;
-		readonly Sprite[] sprites;
-		readonly Sprite unexploredTile;
+		readonly Sprite[] shroudSprites, fogSprites;
 		readonly int[] spriteMap;
 		readonly CellLayer<ShroudTile> tiles;
 		readonly int variantStride;
@@ -78,13 +85,33 @@ namespace OpenRA.Mods.RA
 			shroudHash = -1;
 
 			// Load sprite variants
-			sprites = new Sprite[info.Variants.Length * info.Index.Length];
-			variantStride = info.Index.Length;
-			for (var j = 0; j < info.Variants.Length; j++)
+			if (info.ShroudVariants.Length != info.FogVariants.Length)
+				throw new InvalidOperationException("ShroudRenderer must define the same number of shroud and fog variants!");
+
+			if ((info.OverrideFullFog == null) ^ (info.OverrideFullShroud == null))
+				throw new InvalidOperationException("ShroudRenderer must cannot define overrides for only one of shroud or fog!");
+
+			var variantCount = info.ShroudVariants.Length;
+			variantStride = info.Index.Length + (info.OverrideFullShroud != null ? 1 : 0);
+			shroudSprites = new Sprite[variantCount * variantStride];
+			fogSprites = new Sprite[variantCount * variantStride];
+
+			for (var j = 0; j < variantCount; j++)
 			{
-				var seq = map.SequenceProvider.GetSequence(info.Sequence, info.Variants[j]);
+				var shroud = map.SequenceProvider.GetSequence(info.Sequence, info.ShroudVariants[j]);
+				var fog = map.SequenceProvider.GetSequence(info.Sequence, info.FogVariants[j]);
 				for (var i = 0; i < info.Index.Length; i++)
-					sprites[j * variantStride + i] = seq.GetSprite(i);
+				{
+					shroudSprites[j * variantStride + i] = shroud.GetSprite(i);
+					fogSprites[j * variantStride + i] = fog.GetSprite(i);
+				}
+
+				if (info.OverrideFullShroud != null)
+				{
+					var i = (j + 1) * variantStride - 1;
+					shroudSprites[i] = map.SequenceProvider.GetSequence(info.Sequence, info.OverrideFullShroud).GetSprite(0);
+					fogSprites[i] = map.SequenceProvider.GetSequence(info.Sequence, info.OverrideFullFog).GetSprite(0);
+				}
 			}
 
 			// Mapping of shrouded directions -> sprite index
@@ -92,22 +119,14 @@ namespace OpenRA.Mods.RA
 			for (var i = 0; i < info.Index.Length; i++)
 				spriteMap[info.Index[i]] = i;
 
-			// Synthesize unexplored tile if it isn't defined
-			if (!info.Index.Contains(0))
-			{
-				var ts = Game.modData.Manifest.TileSize;
-				var data = Exts.MakeArray<byte>(ts.Width * ts.Height, _ => (byte)info.ShroudColor);
-				var s = map.SequenceProvider.SpriteLoader.SheetBuilder.Add(data, ts);
-				unexploredTile = new Sprite(s.sheet, s.bounds, s.offset, s.channel, info.ShroudBlend);
-			}
-			else
-				unexploredTile = sprites[spriteMap[0]];
+			if (info.OverrideFullShroud != null)
+				spriteMap[info.OverrideShroudIndex] = variantStride - 1;
 		}
 
 		static int FoggedEdges(Shroud s, CPos p, bool useExtendedIndex)
 		{
 			if (!s.IsVisible(p))
-				return 15;
+				return useExtendedIndex ? 240 : 15;
 
 			// If a side is shrouded then we also count the corners
 			var u = 0;
@@ -134,7 +153,7 @@ namespace OpenRA.Mods.RA
 		static int ShroudedEdges(Shroud s, CPos p, bool useExtendedIndex)
 		{
 			if (!s.IsExplored(p))
-				return 15;
+				return useExtendedIndex ? 240 : 15;
 
 			// If a side is shrouded then we also count the corners
 			var u = 0;
@@ -181,7 +200,7 @@ namespace OpenRA.Mods.RA
 			foreach (var cell in map.Cells)
 			{
 				var screen = wr.ScreenPosition(cell.CenterPosition);
-				var variant = Game.CosmeticRandom.Next(info.Variants.Length);
+				var variant = Game.CosmeticRandom.Next(info.ShroudVariants.Length);
 				tiles[cell] = new ShroudTile(cell, screen, variant);
 			}
 
@@ -194,10 +213,7 @@ namespace OpenRA.Mods.RA
 			if (flags == 0)
 				return null;
 
-			if (flags == 15)
-				return unexploredTile;
-
-			return sprites[variant * variantStride + spriteMap[flags]];
+			return shroudSprites[variant * variantStride + spriteMap[flags]];
 		}
 
 		void Update(Shroud shroud)
@@ -215,8 +231,8 @@ namespace OpenRA.Mods.RA
 					var t = tiles[cell];
 					var shrouded = ObserverShroudedEdges(t.Position, map.Bounds, info.UseExtendedIndex);
 
-					t.Shroud = GetTile(shrouded, t.Variant);
-					t.Fog = GetTile(shrouded, t.Variant);
+					t.Shroud = shrouded != 0 ? shroudSprites[t.Variant * variantStride + spriteMap[shrouded]] : null;
+					t.Fog = shrouded != 0 ? fogSprites[t.Variant * variantStride + spriteMap[shrouded]] : null;
 				}
 			}
 			else
@@ -227,8 +243,8 @@ namespace OpenRA.Mods.RA
 					var shrouded = ShroudedEdges(shroud, t.Position, info.UseExtendedIndex);
 					var fogged = FoggedEdges(shroud, t.Position, info.UseExtendedIndex);
 
-					t.Shroud = GetTile(shrouded, t.Variant);
-					t.Fog = GetTile(fogged, t.Variant);
+					t.Shroud = shrouded != 0 ? shroudSprites[t.Variant * variantStride + spriteMap[shrouded]] : null;
+					t.Fog = fogged != 0 ? fogSprites[t.Variant * variantStride + spriteMap[fogged]] : null;
 				}
 			}
 		}
diff --git a/mods/cnc/bits/fullshroud.shp b/mods/cnc/bits/fullshroud.shp
new file mode 100644
index 0000000000..6d687e204c
Binary files /dev/null and b/mods/cnc/bits/fullshroud.shp differ
diff --git a/mods/cnc/rules/world.yaml b/mods/cnc/rules/world.yaml
index f40d5491ca..3eb91bd8a8 100644
--- a/mods/cnc/rules/world.yaml
+++ b/mods/cnc/rules/world.yaml
@@ -72,7 +72,10 @@ World:
 		Name: fog
 		Fog: true
 	ShroudRenderer:
-		Variants: typea, typeb, typec, typed
+		ShroudVariants: typea, typeb, typec, typed
+		FogVariants: typea, typeb, typec, typed
+		OverrideFullShroud: full
+		OverrideFullFog: full
 	Country@gdi:
 		Name: GDI
 		Race: gdi
diff --git a/mods/cnc/sequences/misc.yaml b/mods/cnc/sequences/misc.yaml
index f03536b144..7923c38446 100644
--- a/mods/cnc/sequences/misc.yaml
+++ b/mods/cnc/sequences/misc.yaml
@@ -442,6 +442,7 @@ shroud:
 	typed: shadow
 		Start: 36
 		Length: 12
+	full: fullshroud
 
 # Note: The order of smudges and craters determines
 # the index that is mapped to them in maps
diff --git a/mods/d2k/bits/fullshroud.shp b/mods/d2k/bits/fullshroud.shp
new file mode 100644
index 0000000000..e778274b51
Binary files /dev/null and b/mods/d2k/bits/fullshroud.shp differ
diff --git a/mods/d2k/rules/world.yaml b/mods/d2k/rules/world.yaml
index 7b72401fdd..065254f6a8 100644
--- a/mods/d2k/rules/world.yaml
+++ b/mods/d2k/rules/world.yaml
@@ -87,9 +87,11 @@ World:
 		Offset: 12007
 		InvertColor: true
 	ShroudRenderer:
-		Variants: typea, typeb, typec, typed
+		ShroudVariants: typea, typeb, typec, typed
+		FogVariants: typea, typeb, typec, typed
 		Index: 11, 3, 7, 9, 6, 13, 12, 14, 4, 8, 2, 1, 5, 10
-		ShroudColor: 31
+		OverrideFullShroud: full
+		OverrideFullFog: full
 		ShroudBlend: Multiply
 	Country@Atreides:
 		Name: Atreides
diff --git a/mods/d2k/sequences/misc.yaml b/mods/d2k/sequences/misc.yaml
index eec8df8a7c..9d99c60a6f 100644
--- a/mods/d2k/sequences/misc.yaml
+++ b/mods/d2k/sequences/misc.yaml
@@ -347,6 +347,8 @@ shroud:
 		Length: 14
 		Offset: -16,-16
 		BlendMode: Multiply
+	full: fullshroud
+		BlendMode: Multiply
 
 rockcraters:
 	rockcrater1: DATA
diff --git a/mods/ra/rules/world.yaml b/mods/ra/rules/world.yaml
index 26d5a21173..441c3a3f3c 100644
--- a/mods/ra/rules/world.yaml
+++ b/mods/ra/rules/world.yaml
@@ -87,6 +87,7 @@ World:
 		Name: fog
 		Fog: true
 	ShroudRenderer:
+		FogVariants: shroud
 		Index: 255, 16, 32, 48, 64, 80, 96, 112, 128, 144, 160, 176, 192, 208, 224, 240, 20, 40, 56, 65, 97, 130, 148, 194, 24, 33, 66, 132, 28, 41, 67, 134, 1, 2, 4, 8, 3, 6, 12, 9, 7, 14, 13, 11, 5, 10, 15, 255
 		UseExtendedIndex: true
 	Country@0:
diff --git a/mods/ts/sequences/misc.yaml b/mods/ts/sequences/misc.yaml
index 59e152eadd..2f73cc9c2c 100644
--- a/mods/ts/sequences/misc.yaml
+++ b/mods/ts/sequences/misc.yaml
@@ -387,6 +387,8 @@ resources:
 shroud:
 	shroud: shadow #TODO: use shroud.shp
 		Length: *
+	fog: shadow
+		Length: *
 
 scorches: #TODO: make use of 07-12 as well
 	sc1: burnt01