Hierarchy classification:

1. top of the aat hierarchies
2. Associated Concepts Facet
3. Associated Concepts (hierarchy name)
4. [concepts in the arts and humanities]
5. artistic concepts
6. formal concepts (artistic concept)
7. [visual and representational concepts]
8. optical illusion

Anotations

Scope note:

Visual phenomena derived from the French word for 'watered' that is produced when a set of straight or curved lines spaced equally apart is superimposed onto another set at a particular angle, resulting in a distinct geometrical design; used to represent and identify fluid flow, wave motion, and optic and magnetic field patterns and flows.