There are four categories of texture.
1. Actual texture is experienced through the sense of touch. This may refer to the textural quality of the surface of an artwork (as in heavy brush strokes vs. a smooth airbrushed surface) or the inclusion of textural materials like gluing fabric or sand to the surface.
2. Simulated texture is experienced visually. It is an artist's rendering of an actual texture as in the drawing above.
3. Symbolic texture is an artist's interpretation of actual textures rendered more subjectively. In other words, under the influence of the artist's imagination.
4. Invented texture is a pattern of marks derived from the artist's imagination. This may included hatching, cross-hatching, stippling, etc. All of which are techniques for creating tonalities but also exhibit a textural quality.