Polygonal modeling is a technique used in 3D computer graphics to create shapes and objects. It involves using polygons, which are flat shapes with straight sides, to build complex models. The most common polygon is the triangle, but models can also be made from quadrilaterals and other shapes. Artists manipulate these polygons to form the desired structure, such as characters, environments, or objects. This method is widely used in various fields, including video game design, animation, and virtual reality. Software like Blender, Maya, and 3ds Max are popular tools for polygonal modeling, allowing creators to refine their designs and add textures for realism.