Hidden Doors for Secret Passageways

[Draegon]

I was thinking that hidden doors should be added. They could look like a normal wall or stone type but with a subtle difference. This would permit better entrances into bases and allow for better traps to be set for raids so colonists would not be at risk of hitting a specific trap. They could be used as a  They should not be foolproof of course, they could be discovered by raiders if they walk right next to them or raiders could possibly seek them out sometimes. They would also be slower to open than regular doors.