diff --git a/mods/cnc/rules/world.yaml b/mods/cnc/rules/world.yaml
index 08dec3e61f..c7d204aa70 100644
--- a/mods/cnc/rules/world.yaml
+++ b/mods/cnc/rules/world.yaml
@@ -110,7 +110,7 @@ World:
 		Name: Tiberium
 		PipColor: Green
 		AllowedTerrainTypes: Clear,Road
-		AllowUnderActors: false
+		AllowUnderActors: true
 	FixedColorPalette@BlueTiberium:
 		Base: terrain
 		Name: bluetiberium
@@ -127,7 +127,7 @@ World:
 		Name: BlueTiberium
 		PipColor: Blue
 		AllowedTerrainTypes: Clear,Road
-		AllowUnderActors: false
+		AllowUnderActors: true
 	PathfinderDebugOverlay:
 	TerrainGeometryOverlay:
 	SpawnMapActors:
diff --git a/mods/d2k/rules/world.yaml b/mods/d2k/rules/world.yaml
index e138f0b2b6..ca8373fe51 100644
--- a/mods/d2k/rules/world.yaml
+++ b/mods/d2k/rules/world.yaml
@@ -120,7 +120,7 @@ World:
 		Name: Spice
 		PipColor: green
 		AllowedTerrainTypes: Sand
-		AllowUnderActors: false
+		AllowUnderActors: true
 	SmudgeLayer@Rock:
 		Type: RockCrater
 		Sequence: rockcraters
diff --git a/mods/ts/rules/world.yaml b/mods/ts/rules/world.yaml
index 45eba178c1..fc667cf5e2 100644
--- a/mods/ts/rules/world.yaml
+++ b/mods/ts/rules/world.yaml
@@ -130,7 +130,7 @@ World:
 		Name: Tiberium
 		PipColor: Green
 		AllowedTerrainTypes: Clear, Rough, DirtRoad
-		AllowUnderActors: false
+		AllowUnderActors: true
 		TerrainType: Tiberium
 	FixedColorPalette@BlueTiberium:
 		Base: player
@@ -147,7 +147,7 @@ World:
 		Name: BlueTiberium
 		PipColor: Blue
 		AllowedTerrainTypes: Clear, Rough, DirtRoad
-		AllowUnderActors: false
+		AllowUnderActors: true
 		TerrainType: BlueTiberium
 	PathfinderDebugOverlay:
 	TerrainGeometryOverlay: