Penrose triangle

sketchfab

The impossible tribar, also known as the Penrose triangle or the Penrose tribar, is a triangular shape that appears to defy logic. It was first conceived by Oscar Reutersvärd, a Swedish artist who pioneered this concept in 1934. Later, the psychiatrist Lionel Penrose and his mathematician son Roger independently developed and showcased it in the 1950s, labeling it as "the epitome of impossibility." This is an optical illusion created using Blender's capabilities.