Cathedral stained glass by The Paul Wissmach Glass Company is transparent and monochromatic with a smooth or textured surface. This art glass is used by stained glass artists and hobbyists to create stained glass art. Textures include English Muffle, Corella Classic, Granite, Hammered, Seedy, Ripple and more. Cathedral glass is made up of a single color. The opacity of the glass is dependent on the color of the glass sheet; lighter colors will allow more light to pass through while darker colors will prevent light from passing through.