3D modeling refers to creating three-dimensional representations of objects, characters, and environments within a game. It involves shaping, texturing, and detailing these models using specialized software. 3D art, on the other hand, includes the entire visual design process, from concept art and modeling to the application of textures, lighting, and rendering. While 3D modeling is a crucial step in creating game assets, 3D art encompasses the broader visual development that brings these models to life within the game world.