# The Art of Deception

Street Artists are known for their ability to create works of art that defy logic by playing with our perception. For many of these sidewalk street art pieces, the artists take advantage of monocular depth cues to create a sense of distance and relative size in their art, thereby adding an illusion of a deep chasm in the picture displayed above.

The artist behind the chasm image played with relative size of the objects in the image to create a sense of depth. By drawing the stalagmites smaller than the stalactites, the artist created the illusion that there is a steep drop down to the base of the chasm.

The artist also used lighting and shadow to add to the illusion. The darker shadows on the water cause the viewer to perceive that the water is far below them, and that the lighter colored stalactites are closer to the viewer.

While we know that this piece of art is really a 2-Dimensional representation of a 3-Dimensional occurrence, the use of monocular cues skews with the viewer's relative perception of the objects within the image to create depth. Street artists take advantage of the monocular depth cues to change their art from a flat drawing to a piece that messes with the perception and minds of the audience.
More examples of street art are available here

Wow... What a great piece of art! It is really well done. The artist used many different visual cues to enable us to see an interesting perspective. Relative size is manipulated by making the lake on the bottom of the "cave" seem deeper than the surrounding pavement. The artist also takes advantage of shadows from the light in the cave to make it look even more three dimensional. Depth perception is cued by the artwork, and the artist does a fantastic job making this "cave" look real.

Remarkable! These pavement illusions get me every time. It is incredible to me just how easily our minds can be manipulated and tricked into believing a perceived image. The way the artist works with relative size, and utilizes the shadows is quite believable. I can feel myself trying to see the image in 2-D, but with all of the tricks being put together, it is difficult to switch out of the 3-D imagery. Depth perception is truly amazing.

This are so cool! I wonder who first came up with the idea to make them? It's weird to think about them just being 2-D when we see them so differently from a certain angle. It's interesting how they manipulate monocular cues to make us see something that really isn't there. Amazing!

I find these chalk drawing fascinating! It is interesting to learn how our eyes and brain perceive images to make them look like they are 3D when in reality they are only 2D.

This type of art is fascinating. I would love to see some in person to see how the effect is different. If you think about art, it is all about perception and understanding how the viewer will react in conjunction to how you want them to react, and manipulating the process to achieve the desired outcome. There is more science and math involved in art than what most people would give respect to. However, I do think most people give respect to the 2D/3D street art, because it is fascinating. Good subject!

This type of art is fascinating. I would love to see some in person to see how the effect is different. If you think about art, it is all about perception and understanding how the viewer will react in conjunction to how you want them to react, and manipulating the process to achieve the desired outcome. There is more science and math involved in art than what most people would give respect to. However, I do think most people give respect to the 2D/3D street art, because it is fascinating. Good subject!

I also think this is fascinating. I feel like creating a work of this size would take a good deal of time though. The way they trick the eye using relative size is astounding. Do you know if there are any in the U.S.? I certainly haven't seen any. This illusion is very interesting and makes me feel like popping into an animated world like Disney's Mary Poppins. I should like to see one of these in person someday.

Nice description of how the drawings work.

I really liked how you described in detail how the illusion worked and the differences between the dark and light contrasting colors. I love these drawings but I can never get my mind to see the drawing as just 2D. It always looks 3D to me.