Autodesk 12812-051462-9011 User Guide 3 - Page 764

Procedure To use the Environment/Background Switcher map: This procedure assumes you have two photographs: one of a background, and another an image of a mirror/chrome ball, both taken from roughly the same camera position. The photo of the chrome ball should be cropped so that it exactly touches the edges of the ball. The best result is obtained if at least the chrome ball photo is HDR, but good results can be achieved with a traditional, non-HDR phogograph. NOTE This workflow applies to stills or video sequences with only slight camera movement. For any complex fly-around camera motion, the simple "auto-unwrapping" performed by the Environment Probe/Chrome Ball shader will not suffice. 1 Open the Environment And Effects dialog to the Environment panel on page 6689. 2 On the Common Parameters rollout, click the Environment Map button. This opens the Material/Map Browser. 3 From the browser list, choose Environment/Background Switcher (mi). The Environment Map button label now shows the name of the map. 4 Open the Material Editor. 5 Drag the Environment Map button to a sample sphere in the Material Editor. Confirm the Instance choice. This displays the Environment/Background Switcher (mi) Parameters rollout in the Material Editor. 6 Click the Background map button. From the Material/Map Browser, choose a map; Environment/Background Camera Map (mi) on page 6020 is the recommended choice. This displays the map's parameters rollout. Click the Map button ("Browse") and choose a bitmap file for the background image. 7 Click Go To Parent to return to the Switcher controls. 8 Click the Environment/Reflections map button. From the Material/Map Browser, choose a map; Environment Probe/Chrome Ball (mi) on page 6023 is the recommended choice. mental ray Shaders | 6019