Chapter 6: Special effects Note: This photo is highly processed so the colors may seem unrealistic, but that has no effect on the process of these exercises. 4. Close all windows and dialogs and save the file. While it is not necessary to have the image in the viewport background in order to render a scene with a background image, it is necessary when aligning the truck and plane to match the background. 6.4.5.2 Exercise:Environmentbackground 1. Open the file called Ch06_matte_shadow_02.max from the preceding exercise or from the CD-ROM and save it to your hard drive with the name Ch06_matte_shadow_03.max. From the Rendering pull-down menu, choose Environment, and in the Common Parameters rollout, Background area of the Environment tab, pick the None button for Environment Map. In the Material/Map Browser, double-click Environment/ Background Switcher (mi) (see Figure 6.96). This shader acts as a container for the background and the reflection photo that will be used as the rendering environment background.