Negative space enclosed by letterforms is called counters.
Negative space is white space that letters such as O or D have (enclosed white space within the letter). Well, in typography, that white/negative space is called a counter, or aperture, or inner space, or enclosed space.
What are the options?
These are some of the early cave painting sights though:
<span>Cave of El Castillo, Spain.Lascaux, France.Grotte de Cussac, France.Pech Merle, near Cabrerets, France.La Marche, in Lussac-les-Châteaux, France.Les Combarelles, in Les Eyzies de Tayac, Dordogne, France.Chauvet Cave, near Vallon-Pont-d'Arc, France.<span>Cave of Niaux, France.</span></span>
The tool is usually used to incise engravings in metal plates, which are then used for printmaking.
