solid illusion

A solid illusion refers to the perception that something appears solid and substantial, but is actually not. This concept often explores how our senses can be deceived by visual or tactile cues. For example, a perfectly still surface may seem solid but can be composed of liquid or gas at a microscopic level. In art or design, solid illusions can be created through techniques that manipulate light and shadow, making a flat surface appear three-dimensional. This phenomenon highlights the complexity of human perception and how our brains interpret sensory information.