When you map a 2D or 3D texture to an object, you connect it to an attribute of the object’s material. Textures map to geometry based on the object’s UV texture coordinates. For more information about texture mapping, see Texture mapping.
Unless you use a method that explicitly connects a texture to a specific attribute of the object’s material, it connects to the material’s default attribute (usually color or transparency). For more information on node connections, see Render node connections.
If you are working in Mac OS X, 2D textures must be used as projections when they are placed on volumetric objects.
To map a texture using Hypershade
For information about mapping methods, see Mapping methods.
The texture is placed on the object in a default position, and a placement node appears in the Hypershade. For more information on placement nodes, see Place 2d Texture.