Autodesk 12812-051462-9011 User Guide 3 - Page 100

(if it has a Generate Mapping Coords check box), or apply a UVW Map modifier on page 1931 or an Unwrap UVW modifier on page 1841. ■ A mapped material must be applied to the object. ■ Show Map In Viewport must be on, either at the level of the material that contains the map on page 8036, or at the top level of the material. NOTE With the software display driver on page 7794, viewports don't accurately display a map with transparency that has UV tiling or mirroring. Also, this driver cannot display a map on a faceted material. 3D Maps in Viewports Show Map In Viewport works for 3D procedural maps as well as 2D maps. 3D map display in viewports is not necessarily accurate. To improve the 3D preview, you can use the Material Editor Options dialog on page 5335 to set the 3D Map Sample Scale to equal a main dimension of the object you are applying the map to. For example, if you want to use the planet map on a sphere with a radius of 20, change the map scale from 100 (the default) to 20. Particle Age and Particle MBlur maps do not preview in viewports. Multiple Maps in Viewports Viewports can display multiple maps. For multiple map display, the display driver must be OpenGL on page 7796 or Direct3D on page 7802. The software display driver on page 7794 does not support multiple map display. The composite map on page 5918 and mix map on page 5926 support multiple map display. In addition, turning on Show Map In Viewport at the top level of a standard material on page 5395 lets you view maps on both the diffuse and opacity components (though not on other mapped components). Procedures To view maps interactively: 1 Select an object. 2 In the object's creation parameters, make sure that Generate Mapping Coords. is on. (If this option isn't enabled, the object can't be mapped.) Material Editor Tools | 5355