A layer of paint, thinned with a medium, so as to become somewhat transparent. A glaze changes the color cast or texture (gloss or matte, for instance) of the surface. When the technique is used for walls the entire surface is covered, often showing traces of texture. Either oil-based or water-based materials are used, depending upon the desired effect. In general, water glazes are best suited to rougher textures where overlaps of color are acceptable.