The texture or roughness of a surface. Mostly associated in art with the surface texture of paper. In an art store or with paper samples, look at the texture, touch the texture and when the paper is yours -- use pencil, charcoal and other media on the paper to see how it will look and what it will do. The surface of the paper determines how the different mediums will appear on the surface and it can make a big difference with different papers or canvas or board.