Caroline Rees Glass Design specialise in contemporary etched glass for windows, which is an alternative to traditional obscure glass, and can be made to order in an original design. Have you considered shutters? Louvred shutters provide a covering for the windows and if the blades are tilted, light can still come into the room. There are many shutter makers listed on our website, including The California Shutters Co, The Capella Shutter Company or  Deco. Venetian blinds can also allow light in but provide privacy as you can control the direction of the slats. Companies like BellaVista Shutters & Blinds can help with this solution. For a softer option, you could use a sheer linen panel beneath a Roman blind – this would still let in light. You could try sheer linens from Volga Linen or from Ada & Ina .