Hierarchy classification:

1. top of the aat hierarchies
2. Activities Facet
3. Processes and Techniques (hierarchy name)
4. [processes and techniques by specific type]
5. [image-making processes and techniques]
6. [perspective and shading techniques]
7. perspective (technique)

Anotations

Scope note:

Refers to the effect of suggesting pictorial depth by depicting more distant things with less clarity of outline and detail. Where color is involved, distant objects may be indicated by alteration of hue toward blue, and decrease of color saturation and value contrast.