Our eyes are part of a complex perception system. We interpret the world around us the best we can with the tools we have, called monocular depth cues. The following six screenshots are virtual examples of those depth cues from six different worlds in Meshmoon.
Above I have circled an example of the monocular depth cue "Size Differences". The trees that are closer to my avatar appear to be larger than the ones farther away, when in reality they are all the same size and type of tree.
Above is an example of the monocular depth cue "Occlusion". Occlusion tells us which objects are closer by with one in front of the other. The fireplace is in front of the support beam of the house, which means it is closer to me.
Above is an example of the monocular depth cue "Lighting and shading". The light shining on the circus tent is very bright in the center area where the light hits, and it becomes darker the farther away from the center that you look. Enlarging this screenshot will give you a much better look at this depth cue.
Above is an example of the monocular depth cue "Texture Density". The clapboards to the left appear to be more dense than the ones directly infant of me because they are farther away.
Above is an example of the monocular depth cue "Linear Perspective". The street appears to become narrower the farther away you look. They continue to look closer and closer together until they meet at the vanishing point where they appear to converge and disappear at the horizon.
Above is an example of the monocular depth cue "Atmospheric Perspective". As we look farther away, our eyes receive images that are cluttered up with particles other than light (i.e gas, water) and they cause what we see to look fuzzier. So that is why the surface of the moon is clear and detailed close up, but blurry and fuzzy farther away. The surface itself does not change, only our perception.
This is an exercise about monocular depth cues in a program called Meshmoon. It is a finals exercise from the Immersive Education course that I am taking at Boston College. The course is called Discovering Computer Graphics. For details, visit the immersive BC portal at http://ImmersiveEducation.org/@/bc
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