8

218 Chapter 18: Effects and Environments
Oversampling—
Cont rols the level of antialiasing
applied to the Hair buffer render. The available
choices are Draft, Low, Medium, High, and
Maximu m. The Draft setting uses no antialiasing.
High is suitable for most fina l renders, and in
extreme cases, use Maximum. The higher the
Oversampling level, the greater the memory
requirements and render time.
Composite Method group
This option lets you choose the metho d by which
Hair composites hair with the rest of the scene.
Compositing options are available only with the
Buffer rendering method.
• None: Renders the hair only, with occlusion.
The resulting image is ready to composite.
• Off : Renders hair shadows but not t he hair.
• Normal: Does standard rendering and
composites the occluded hair with the rest
of the scene in the rendered frame window.
Bec ause of the o cclusion, hair will not appear
behind (through) transparent objects.
• GB u ff er: Buffer-rendered hair appears
behind most transparent objects. Transparent
refractive objects aren’t supported.
Occlusion Objects group
This sett ing lets you choose which objects will
occlude hair in the scene; that is, if the object is
closer to the camera than part of the hair ar r ay, the
hairs behind it won’t render. By default, all objects
inthesceneoccludehairbehindthem.
• Auto: All renderable objects in the scene
occlude hair behind them.
• All: All objects in t he scene, including
non-renderable objects, occlude hair behind
them.
• Custom: Lets you specify objects that will
occlude hair. Choosing this option makes the
buttons on the right slide of the list available.
If you choose Custom but don’t specify any
occlusion objects, no objects will occlude the
hair ; that is, the hair will appear in front of all
objects, whether or not it’s closer to the camera
than the objects.
[list]—The list of occlusion objects. To edit this list,
choose Custom and then use the buttons on the
right side of the list.
Add—Adds a single object to t he list. C lick Add
and then, in a viewport, select the object to add.
Add List—Adds multiple objects to the list. Click
Add and then, in a viewport, select each object to
add in turn. To finish, right-click in the v iewpor t
or click Add List again to tur n it off.
Replace—Replaces a highlig hted object in the list
with another from t he scene. Highlight the object
to be replaced, click Replace, and then selec t the
replacement object in a viewport.
Delete—Deletes a highlighted object from the list.
Highlight the object to be replaced and then click
Delete.
Lighting group
These settings control illumination of and
shadow-casti ng from hair by spot lights in the
scene.
Note: Only spot lights can illuminate and cast
shadows from hair.
Shadow Density—Specifies the relative darkness of
the shadows. At the default/highest value, 100.0,
shadows are darkest. At the lowest value, 0.0,
shadows are fully transparent, so they don’t render .
Range=0.0 to 100.0. Default=100.0.
Use all lights at render time—When on, causes
allspotlightsinthescenetoilluminateandcast
shadows from hair when the scene is rendered.
Note that shadows are cast only from spot lights
with the Shadows switch on. When off, only spot