Autodesk 12812-051462-9011 User Guide 3 - Page 715

rendering. When on, the options in the Automatic group are active, letting you choose whether the maps will be generated only once, or regenerated at specified frames in the animation. From File When on, you can specify the bitmaps to use. When From File is active, the controls in the Render Cubic Map Files group are also available. You can generate the six cubic reflection maps automatically and save them to files, where you can load them with the From Files controls. Size Sets the size of the Reflect/Refract maps. The default value of 100 produces distinct images. Lower values lose progressively more detail. Use Environment Map When off, environment maps are ignored by Reflect/Refract map during rendering. It's useful to turn this off when you have mirrors in the scene and you're rotoscoping against a flat screen environment map. A screen environment map does not exist in 3D space the way the other environment-map types do, and will not render properly. Blur group Apply Turns on filtering to blur the maps. Blur Offset Affects the sharpness or blurriness of the map without regard to its distance from the object. Use Blur Offset when you want to soften or defocus the details in a map to achieve the effect of a blurred image. Blur Affects the sharpness or blurriness of the generated map based on its distance from the object. The farther away the map is, the greater the blurring. Blur is primarily used to avoid aliasing on page 7904. It's a good idea to use a small amount of blurring for all maps in order to avoid the scintillation or aliasing that can occur when pixel details are reduced off in the distance. Default=1. Atmosphere Ranges group If your scene contains environmental Fog on page 6707, the cubic maps must have near and far range settings to properly render the fog from the point of view of the object assigned the material. The Near and Far spinners in this group let you specify a fog range relative to the object. Near Sets the near range for fog. Far Sets the far range for fog. Get From Camera Uses the Near and Far atmosphere range settings of a camera in the scene. Click this option, and then select the camera. 5970 | Chapter 19 Material Editor, Materials, and Maps