3D models in Unity use .fbx or .obj formats by importing them as asset files, enabling integration of 3D geometry, textures, and animations into the project.
Unity’s import pipeline processes these files upon import, extracting mesh data (vertices, polygons) and material references, which are essential for rendering.
For .fbx files, additional animation clips (e.g., character movements) are also extracted, supporting dynamic animations in scenes.
Once imported, the models become editable assets, usable in scenes, prefabs, or as components of game objects, streamlining development workflows.
This import method ensures .fbx and .obj models are seamlessly integrated into Unity, providing flexibility for 3D content creation.