9

Thin Wall Refraction Map 1703
You can edit one or more of the cubic maps using
a pain t program, then click Reload to update the
material and the scene.
Render Cubic M ap Files group
To File—Choose a file name for t he Up map (_UP).
Pick Object and R ender Maps—Active when you
choose a file. Click to turn on, then select the
mapped object to render the six cubic maps.
Assign the cubic maps to the six From File buttons.
Thin Wall Refraction Map
Material Editor > Maps rollou t > Click a Map button. >
Material/Map Browser > Thin Wall Refracti on
Thin wall refraction
Thin Wall Refraction simulates the "jog," or offset
effect, you find when you view part of an image
through a plate of glass. For objects that model
glass, such as a Box in the shape of a window pane,
this map is faster, uses less memory, and provides
amuchbettervisualeffectthantheReflect/Refract
map.
Tip: At 100% refraction and opacity, you can see
no diffuse color or mapping, and there is not
much illusion of a refractive material. The effect
is invisible. In the Maps rollout of the parent
material, set Refraction Amount to 50%, and in
the Basic Parameters rollout, set Opacity to a value
greater than 0.
Procedure
To assign the Thin Wall Refraction map to a mater ial:
1.
Click the Map button for Refraction in the
material’s Maps rollout.
2. In the Material/Map Browser, choose Thin Wal l
Refraction.
3. Adjust the map ’s parameters.
4. Intheparentmaterial,settheRefractionMap
Amount to 50%.
5. Assign the material to an object.
Interfa ce
Blur group
These controls are for antialiasing.
Apply B lu r—Turns on filtering to blur the maps.
Blur—Affectsthesharpnessorblurrinessofthe
generated map based on its distance from the
object. The far t her away the map is, the greater
the blurring. Blur is primarily used to avoid
aliasing (page 3–907). 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.