What type of file is typically considered best for 3D models in Unity?

The FBX file format is widely regarded as the best choice for 3D models in Unity due to its robust capabilities in handling complex animations, skins, and hierarchies. It supports not just the geometry of the model, but also crucial attributes such as textures, materials, and animations, making it highly versatile for game development.

Unity has strong native support for FBX, allowing for smooth import and immediate use within the engine, which enhances workflow efficiency. This format is particularly advantageous when working with animated characters or objects because it can encapsulate the animation data alongside the model, ensuring that all elements are imported together seamlessly.

In contrast, while other formats are capable of representing 3D models, they often lack the comprehensive features that FBX provides. For example, OBJ files are limited to geometry and texture coordinates, excluding animation data. PNG and JPG, on the other hand, are image formats primarily used for 2D assets like textures but do not serve for 3D model representation. Hence, the FBX format stands out as the most suitable for 3D models in Unity.