Answer:
The technique used to show an illusion on a two-dimensional surface is called "trompe-l'oeil."
Step-by-step explanation:
The technique used to create an illusion on a two-dimensional surface is often referred to as "trompe-l'oeil." Trompe-l'oeil is a French term that translates to "deceive the eye." It is an artistic technique that uses realistic imagery to create the optical illusion that the depicted objects exist in three dimensions. Artists employing trompe-l'oeil techniques often play with perspective, shading, and other visual cues to make two-dimensional surfaces appear as though they have depth and realism.