Autodesk 12812-051462-9011 User Guide 3 - Page 696

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=1.0. Render group First Frame Only The renderer creates the automatic flat mirror only on the first frame. Every Nth Frame The renderer creates the automatic flat mirror based on the frame rate on page 7987 set by the spinner. Use Environment Map When off, environment maps are ignored by the mirror 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. Default=on. Apply to Faces with ID Specifies the material ID number where you want the mirror assigned. You can assign a flat-mirror material to an object without having to make it a component of a Multi/Sub-Object on page 5720 material. The restriction is that the other faces on the object must be able to use the nonmirrored properties of the same material (its diffuse color, and so on). If the other faces need completely different material characteristics, you need to use a Multi/Sub-Object material. For example, if you have an object, such as a box, with unique material IDs for each side, you can use Apply To Faces With ID to specify the side of the box that will show the mirror reflection. The remaining sides of the box will have the same material characteristics, but without the reflection. Distortion group To simulate irregular surfaces, you can distort the flat-mirror reflections. Distortion can be based on a bump map or on noise controls built into Flat Mirror material. None No distortion. Use Bump Map Distorts the reflection using the material's bump map. A flat mirror surface that has a Bump map will appear bumpy, but its reflection won't be distorted by the bumps unless you use this option. Reflection and Refraction Maps | 5951