Monocular cues (con't): depth cues available to either eye or alone.

interposition - If one object partially blocks the view of another, we perceive it as being closer. This causes depth perception.
example: a cube drawn like this causes the lines to appear to create a cube because the lines are different colors and they look as though they blend together.

texture gradient - A gradual change from a coarse, distinct texture to a fine, indistinctive texture, signaling increasing distance.
example: the squares in this image are different shapes and sizes, creating a three dimensional look and a larger distance across the image.


linear perspective - This takes place when parallel lines appear to converge with distance. The more  they converge, the greater the distance they are perceived becomes.
example: the lines that make up this railroad in real life are parallel, but the photo makes is seem like they are converging into the distance, making the distance seem farther.