Polygonal modeling is a technique used in 3D computer graphics to create shapes and objects by connecting points, known as vertices, with straight lines to form polygons, typically triangles or quadrilaterals. This method allows artists and designers to build complex structures by manipulating these polygons, making it a fundamental approach in various fields, including video game design and animation. The process involves defining the geometry of an object by adjusting the vertices and edges, which can be textured and colored to achieve realistic appearances. Software like Blender and Maya are commonly used for polygonal modeling, enabling creators to visualize and refine their designs in a digital environment.