Glintstone and Moonglass

Many of the plants on Chromalia require infrared radiation, and some have different life cycles depending on their primary source of energy. For the most part, plants farmed by the Zhil√© are kept in fields around the outskirts of their cities and towns and thrive on solar radiation. Other plants that blossom only during the times of sundown when the great moon is high in the sky are cultivated in large stone buildings with specialised moonglass windows set into their roofs.   Moonglass is derived from a substance called glintstone found in mountain caves and deep ravines. When glintstone is subjected to solar radiation it begins to deteriorate and over time the remaining mineral forms a smooth, though opaque, sheet of rocky "glass". This material allows infrared radiation to pass through but blocks all solar radiation. When the glintstone is mined, it is arranged into special containers while still in the mine and then brought into the sunlight once it's set for correct reduction. This produces window sheets of differing thicknesses which are then carefully sent to regions of high crop production, as well as to the residences of the very wealthy for use in their architecture.   Due to the nature of Chromalia's sun/moon cycle, many of the seeing species on the planet are able to visually sense infrared radiation to some degree. This means that the moonglass may be opaque to reflected solar light, but any infrared information coming through the glass is visible to the extent of the species' ability to see it. The Zhil√©, for instance, are able to see the shapes of heated objects through the glass, but cannot see the object itself.   In the crop houses, the moonglass creates an atmosphere of perpetual moonrise, which must be carefully modulated by the size and placement of the windows in the roofs.

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