Windows
Yellow Drapes, Left Half Tile
A cloth block with 5 hit points.
Crafting
Craft at Backpack · makes 1
Crafted as 
Curtains and Drapes: pick this one of its variants when you place it.
Cloth Fragment× 5
Iron× 5
Drops when destroyed
- Cloth Fragment× 1-3
Where to find (2 POIs)
The Fire Pit Lodge (tier 3), Sweet Sweet Honey Pot Farms (tier 2).
Points of interest built with this block (any of its variants), the highest tiers first, from the game's prefab files.