Texture

Source : Wikipedia

Texture refers to the properties held and sensations caused by the external surface of objects received through the sense of touch. Texture is sometimes used to describe the feel of non-tactile sensations.

Symbolic textures created with lines or shapes :

These patterns suggest various textures and are similar to the use of symbols or icons
to represent ideas or objects.

• Texture: wavy lines could symbolize water, waves, rolling terrain.
•Texture: overlapping circles give the look of fish scales.
•Texture: a grid of lines could simulate plaid or linen fabrics, wire mesh, or other textures.