9

Flat Mirror Map 1697
Inter face
Blur group
Apply B lur—Turns on filtering to blur the maps.
Antialiasing is also applied to the Distortion effect,
if any, when Apply Blur is turned on.
Blur—Affects the sharpness or blurriness of the
generated map based on its distance from the
object. The far ther away the map is, the greater
the blurring. Blur is primarily used to avoid
aliasing (page 3–907).It’sagoodideatousea
smallamountofblurringforallmapsinorderto
avoid the scintillation or alia sing that ca n o ccur
when pixel details are reduced off in the distance.
Default=1.0.
Render group
First Frame Only—The renderer creates the
automaticflatmirroronlyonthefirstframe.
Ever y Nth Frame—The renderer creates the
automatic flat mirror based on the framerate(page
3–944) set by the spinner.
Use E nvi r onment M ap—When off, environment
mapsareignoredbythemirrorduringrendering.
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 do e s not exist in 3D space the way the other
environment-map types do, and will not render
properly. Default=on.
Apply to Faces wi th ID—Specifies the material ID
number where you want the mirror assigned.
You can assign a flat-mirror material to an object
withouthavingtomakeitacomponentofa
Multi/Sub-Object (page 2–1594) material. The
restriction is that t he 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 m aterial
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
useApplyToFacesWithIDtospecifythesideof
the box that will show the mirror reflection. The
remaining sides of the box will have the same
material characterist ics, 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 M a p—Distorts the reflection using the
material’s bump map.