Upgrade 1: Bronze Wall Window
- Utility: Stronger than Wooden Wall Window
- Requirement: 10 woods + 50 Bronze ingots
- Notes: can be opened/closed for more intimity
- Destruction Panel (F7): 14 woods + 15 Bronze ingots
Upgrade 2: Stone Wall Window
- Utility: Stronger than Wooden Wall Window
- Requirement: 35 stones + 35 Bronze ingots
- Notes: can be opened/closed for more intimity
- Destruction Panel (F7): 14 woods + 14 stones + 12 Bronze ingots
Upgrade 3: Volcanic Wooden Wall Window(update 0.19, 29 aug)
- Utility: Stronger than Wooden Wall Window (F6)
- Requirement: 35 Volcanites + 35 Bronze ingots
- Destruction Panel (F7): 12 Bronze ingotss + 12 Volcanites + 14 Woods