Overlap
Occlusion establishes which form is in front.
ELEMENT 08 · FIELD, INTERVAL, DEPTH
Space.
The field and the perceived or physical intervals, depths, volumes, and voids within it.
Space is not leftover background. Margins, intervals, occupied areas, openings, and depth relationships actively organize what can be seen and understood.
Perspective is not the whole subject. Overlap, relative size, placement, convergence, contrast, detail, and atmospheric change can each contribute to spatial perception.
ORIENTATION · THE PICTURE PLANE
Occupied and unoccupied areas define one another.
The black regions are read as occupied positive space. The white channel between them is negative space, but it is deliberately shaped rather than treated as accidental emptiness.
Positive and negative describe a spatial relationship, not good and bad values. Either region can become perceptually prominent.
CONTROLLED DEMONSTRATION 01
Intervals can create groups.
The six identical circles do not change. Only the distances between them change, altering which circles appear related.
CONTROLLED DEMONSTRATION 02
Depth has more than one cue.
Each panel isolates a different source of spatial evidence. In actual images, several cues often operate together.
Relative size
When comparable objects differ in image size, the smaller may read as farther away.
Vertical placement
In some pictorial viewpoints, higher placement can support distance; it is not a universal rule.
Contrast + detail
Reduced edge contrast and detail can support atmospheric distance.
CONTROLLED DEMONSTRATION 03
Perspective systems organize recession.
Linear perspective uses geometry. Atmospheric perspective uses changes in contrast and detail. Neither is synonymous with space itself.
MANIPULATE · DEPTH CUES
Build depth one cue at a time.
All three objects begin equal and separate. Add overlap, relative scale, vertical placement, and contrast/detail independently to see how each variable contributes.
Active cues: none. The objects remain equal and separate.
VOCABULARY
Describe the field and the depth cue.
Name the specific evidence rather than saying only that an image “has perspective.”
- Positive space
- Area occupied or read as figure.
- Negative space
- Area around and between figures.
- Proximity
- Nearness that can imply grouping.
- Overlap
- One form occluding part of another.
- Linear perspective
- A geometric system using convergence toward vanishing point(s).
- Atmospheric perspective
- Depth suggested through reduced contrast, detail, and/or color shift with distance.
- Picture plane
- The flat surface or implied plane of an image.
ANALYZE · MULTIPLE DEPTH CUES
Perspective View of the Interior of a Metropolitan Church
Begin with observable spatial evidence: repeated columns diminish, architectural lines converge, nearer forms overlap farther forms, and tiny figures provide a human scale reference.
- Trace two orthogonals toward the distant opening.
- Where does repetition become smaller or more closely spaced?
- Which value and detail changes separate foreground, middle distance, and far distance?
Rights: the NGA record states that this object’s media is free and in the public domain.
View the official NGA object recordCHECK UNDERSTANDING
Which cue is doing the work?
Two equal shapes touch, but neither covers the other. Is overlap established?
No. Overlap requires occlusion: one shape must interrupt part of another.
Does placing a shape higher always make it farther away?
No. Higher placement can support distance in particular viewpoints and pictorial conventions, but it is not a universal law.
How is atmospheric perspective different from linear perspective?
Atmospheric perspective changes contrast, detail, and sometimes color with distance. Linear perspective organizes directions geometrically through convergence.
CONNECT