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Chapter 9. Materials > Texture Mapping

Texture Mapping

The next step is to replace a surface's solid color with a texture. Normally, a texture refers to applying a 2D image around a 3D surface, rather like wallpapering a curvy surface. Because a 2D image can be stretched, wrapped, and projected onto a surface in many different ways, you must take control of how the image is applied.

Mapping Coordinates

Mapping coordinates, also known as UV coordinates, tell the 3D renderer how to place the 2D map across the geometry, which varies depending on whether the model is created from NURBS or polygons. For NURBS, parametric mapping is inherent to the surface and this is typically what's used. Briefly explained, parametric mapping is the 0 to 1 coordinate system that NURBS uses to map textures across its surfaces. It makes sure that the textures stay mapped to the surface like a decal, even if the geometry is deformed. You can also adjust NURBS mapping to move and rotate how the map is positioned on the object.


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