Diffuse maps are textures used in 3D modeling and computer graphics to define the base color of a surface. They determine how an object appears visually by applying color information to its geometry. This helps create realistic representations of materials, such as wood, metal, or skin, by simulating how light interacts with different surfaces. In game development and animation, diffuse maps are essential for enhancing visual detail without increasing the model's complexity. They work alongside other maps, like normal maps and specular maps, to provide a more comprehensive visual experience, allowing for richer and more immersive environments.