3D texture mapping differs from traditional 2D texture mapping primarily by using 3D volume data instead of 2D images, enabling textures to exist throughout a 3D model’s interior rather than just on its surface.
- **2D texture mapping**: Wraps 2D images (e.g., photos, patterns) onto a model’s surface to simulate surface details like color or texture, limited to external surfaces. - **3D texture mapping**: Embeds texture data in 3D space, allowing textures to permeate the model’s volume—ideal for volumetric effects such as realistic clouds, subsurface scattering (e.g., skin, marble), or internal material details (e.g., wood grain depth).
This makes 3D mapping more suitable for applications requiring depth and internal texture realism, unlike 2D’s surface-only focus.