"Optical Effect" is the street art of Kim ErrEmme , a young and talented artist capable of grasping the expressive forms of faces, detaching and internalizing emotions to transmit signals through lines and colors. The complicity between a simple line and a background with sometimes bright and intense colors create the dimension that leads to go further. It is necessary to move away from the work to see clearly. An invitation to detach oneself from what is apparently perceived, to understand and understand the true essence of what we see. In art as in people. Through two-dimensional illusion effects that induce a state of perceptual instability, Kim ErrEmme provokes and stimulates the observer's involvement.