Basic Geometry 101 - Euclid's Optics, the geometry of vision. Linear Perspective. You didn't learn this in school.
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Linear perspective is a technique used by artists to create the illusion of depth and space using relative size and position of a group of objects. To achieve this effect, there are three essential components needed in creating a painting or drawing using linear perspective:
1. Orthogonals (also known as parallel lines)
2. Vanishing point
3. Horizon line
Using these components, it is possible to arrange the composition of a work of art in a way similar to how the human eye sees the world. The guiding principle for this technique is that objects that are closer to the viewer appear to be larger, where objects that are further away appear to be smaller. In order to accomplish this, the artist places a horizontal line across the surface of the picture, which is known as the “horizon line.” Parallel lines or orthogonals then converge as they recede and meet at the vanishing point on the horizon line.
This is how our vision works, we can not see further than a certain distance because of our limited perspective, when objects go beyond the vanishing point, they do just that and vanish. Then if the conditions allow for it, we can zoom into the object to bring it completely back into view.
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