40d:Window

A window is an item of furniture that can be constructed to form solid walls surrounding a room. A window is not considered support for the purposes of preventing cave-ins, but it will block the flow of water. As of version 27.176.38c, magma does not melt constructed windows, no matter what they are made of, although windows made at a glass furnace that haven't been constructed yet will still melt if they are put in magma. Windows can be made from glass at a glass furnace or from cut gems produced at a jeweler's workshop. A glass window can be made from green, clear, or crystal glass. Alternatively, a gem window can be directly constructed from three cut gems of any type (including cut glass). If the gems used to make a gem window are of different colors, the window will flash between the different colors of the gems.

It is not known how dwarves use windows^[Verify], but you can also construct walls and floors out of glass blocks which you might assume has a similar pleasing effect for the occupant. Dwarves who have a liking for specific materials, such as glass, can be kept happy by building windows and walls out of glass.

Light from a window built into a cliff face will not illuminate a room and will not prevent cave adaptation.

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