A Hidden Window is a special type of block which can be used to create secret viewports.
Hidden Window blocks look almost like glass, but without the streaks across the surface. Once placed, if a player interacts with a side while holding a block, that block will "cover" that side and make the side appear exactly like the block. This way it can be used to create secret and/or one-sided windows. They are very useful for secret bases and/or laboratories, observatories, and other builds.
- g = glass
- h = Hidden Foundation
The crafting recipe gives 5 Hidden Windows.