It is strange to imagine what our world would be like without glass. And yet, many of us cannot see much use for the material beyond merely allowing us to see outside and drink beverages in a practical and attractive manner. However, things are changing and the scope for glass is now greater than ever. Currently, certain companies are developing glass that refracts light in different ways to ensure that, whilst still transparent, when light hits it at a certain angle, a shadow is cast in the shape of a particular image. In turn, windows will suddenly not just be functional, but also very decorative at the same time.