Answer:
Shapes and space
Explanation:
3D crafts use shapes and space.
The purpose of space: Distance, area, volume; physical space independent of what occupies it; absolute space.
The purpose of shapes: Positive and negative
Positive shape is the totality of the mass lying between its contours; in three-dimensional work, the visible shape or outer limit of a form changes as the viewer's position is changed. These outer limits are seen as shapes moving back and forth between major contours.
Negative space is empty space defined by a positive shape. Sometimes referred to as occupied and unoccupied space.
