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Part VII: Advanced Materials
                                                 9. Press the M key to open the Material Editor. Click the mapping button next to the Diffuse color,
                                                    png file from the Chap 32 directory on the DVD. Apply this material to the selected wing and
                                                    ailerons. Click the Show Map in Viewport button (the small checkerboard cube icon) to see the
                                                    map on the plane.
                                             Figure 32.13 shows the results of the plane mapping. After the map is applied to the plane and visible in
                                             the viewports, you can open the Edit UVWs window again and tweak the mapping coordinates.
                                        FIGURE 32.13  and double-click the Bitmap type in the Material/Map Browser. Then select the T-28 Trojan logo.
                                      The logo map is positioned on the wing and spreads over to the ailerons also, even though they are separate parts.




























                                             Using the Spline mapping
                                             Spline mapping uses a spline and its cross sections to define the mapping coordinates. Tubular objects cre-
                                             ated with the Loft compound object or with the Sweep modifier are typically very difficult to correctly map
                                             given they don’t fit in any of the existing mapping constructs. They can be unwrapped, but these objects
                                             usually have a lot of polygons, and this makes it difficult to unwrap or to pelt map.
                                             The answer to this tricky object type is to use the Spline mapping method. With this mapping method, you
                                             can select to align the map to circular or planar cross sections. You can also add different cross sections if
                                             the lofted object uses different cross sections.






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