Patterned glass is a not-perfectly-smooth structure with different patterns impressed on it. The depth, size and shape of the patterns largely determine the magnitude and direction of reflection. Patterned glass usually transmits only slightly
less light than clear glass. It can be used for a variety of applications: design and decorations, furniture, windows, street furniture ,louvre glass etc.
Patterned glass is a kind of decorative translucent flat glass with enbossed
patterns on one or both surface(s).with the special property of decoration,patterned
glass can fully allow the light (sunlight) to pass through and on the other
hand ,can limit or prevent clear view  effectively.