Fix tech structures: cannot sell, can repair, fix husks.

mods/cnc/rules/defaults.yaml

@@ -248,9 +248,29 @@
 	WithBuildingExplosion:
 	-RepairableBuilding:
 	-Capturable:
+	-Sellable:
 	Tooltip:
 		Name: Civilian Building
 
+^CivBuildingHusk:
+	AppearsOnRadar:
+	Building:
+		Dimensions: 1,1
+		Footprint: _
+	RenderBuilding:
+	EditorAppearance:
+		RelativeToTopLeft: yes
+	Tooltip:
+		Name: Civilian Building (Destroyed)
+
+^TechBuilding:
+	Inherits: ^CivBuilding
+	Capturable:
+	RepairableBuilding:
+	-DeadBuildingState:
+	RevealsShroud:
+		Range: 3
+
 ^CivField:
 	Inherits: ^CivBuilding
 	-Selectable:

mods/cnc/rules/tech.yaml

@@ -1,36 +1,27 @@
 # Oil Derrick
 V19:
-	Inherits: ^CivBuilding
+	Inherits: ^TechBuilding
-	RenderBuilding:
 	CashTrickler:
 	Building:
 		Footprint: x
 		Dimensions: 1,1
-	RevealsShroud:
-		Range: 3
-	-DeadBuildingState:
-	Capturable:
 	Tooltip:
 		Name: Oil Derrick
 	LeavesHusk: 
 		HuskActor: V19.Husk
 
 V19.Husk:
-	Inherits: ^CivBuilding
+	Inherits: ^CivBuildingHusk
-	-DeadBuildingState:
-	-Health:
-	RenderBuilding:
 	WithFire:
 	Building:
 		Footprint: x
 		Dimensions: 1,1
 	Tooltip:
-		Name: Oil Derrick
+		Name: Oil Derrick (Destroyed)
 
 # Hospital
 HOSP:
-	Inherits: ^CivBuilding
+	Inherits: ^TechBuilding
-	RenderBuilding:
 	Building:
 		Footprint: xx xx
 		Dimensions: 2,2
@@ -39,13 +30,12 @@ HOSP:
 
 # Bio Lab
 BIO:
-	Inherits: ^CivBuilding
+	Inherits: ^TechBuilding
-	RenderBuilding:
 	Building:
 		Footprint: xx xx
 		Dimensions: 2,2
 	Tooltip:
-		Name: Bio Lab
+		Name: Biological Lab
 	Exit@1:
 		SpawnOffset: 0,-10
 		ExitCell: 0,-1
@@ -61,10 +51,18 @@ BIO:
 		OnHoldAudio: onhold1.aud
 		CancelledAudio: cancel1.aud
 	ProductionBar:
-	Capturable:
-	-DeadBuildingState:
 	RallyPoint:
 		RallyPoint: -1,-1
+	LeavesHusk: 
+		HuskActor: BIO.Husk
+
+BIO.Husk:
+	Inherits: ^CivBuildingHusk
+	Building:
+		Footprint: xx xx
+		Dimensions: 2,2
+	Tooltip:
+		Name: Biological Lab (Destroyed)
 
 # Prison / Tech Center
 MISS:

mods/cnc/sequences/map.yaml

@@ -526,11 +526,13 @@ bio:
 		Start: 0
 	damaged-idle:
 		Start: 1
-	dead:
-		Start: 2
 	make: biomake
 		Start: 0
 		Length: *
+
+bio.husk:
+	idle: bio
+		Start: 2
 miss:
 	idle:
 		Start: 0