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222 Chapter 18: Effects and Environments
renderingitself,notthe3dsMaxscene. This
modeomitsfeaturessuchasillumination
textures on the hair , and light falloff calculation
might be slightly inaccurate, but rendering is
somewhat faster.
R aytrace the Reflections/R efractions—Available
only for the “buffer” Hairs option. When on,
reflections and refractions are ray-traced. When
off, they are calculated as usual. Turning this
option on can increase realism at the cost of render
time. Default=off.
Motion Blur group
In order to render motion-bl urred hairs, Motion
Blur must be enabled for the growth object.
Durati on—Thenumberofframesoverwhich
motion blur is calculated for each f rame.
Inter val—The point in the duration at which the
“snapshot” of the hair is captured, before blurring.
The choices are “start”, “middle”, and “end”. The
defaultis“middle”,whichcausesblurringtooccur
at the st art and end of the duration.
Buffer Rendering Options group
This setting applies only to the “buffer” rendering
method.
Oversampling—Controls the level of antialiasing
applied to the Hair “buffer” render . The available
choices are “draft”, “low”, “medium”, “high”,
and “maximum”. T he “draf t” sett ing uses no
antialiasing; “high” is suitable for most final
renders; in extreme cases, use “maximum”.
The higher the Oversampling level, the greater
the memory requirements and render time.
Default=”low.”
Composite Method group
This option lets you choose the metho d by wh ich
Hair composites hair with the rest of the scene.
Compositing options are available only with the
“buffer” rendering method.
•
None—R enders the hair only, with occlusion.
The resulting image is ready to composite.
•
Off—Renders hair shadows but not the hair.
•
Nor mal—(The default.) Does standard
rendering and composites the occluded hair
withtherestofthesceneintherenderedframe
w indow. Because of the occlusion, hair will not
appear behind (through) transparent objects.
•
GB uffer—Buffer-rendered h air appears behind
most transparent objects. Transparent
refractive objects aren’t supported.
Occlusion O bjec ts group
This setting lets you cho ose which objects wil l
occlude hair in the scene; that is, if the object is
closer to the camera than part of the hair array, the
hairs behind it won’t render. By default, all objects
inthesceneoccludehairbehindthem.
•
Auto—(The default.) All renderable objects in
thesceneoccludehairbehindthem.
•
All—All objects in the scene, including
non-renderable objects, occlude hair behind
them.
•
Custom—Lets you spe cify the 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 l ist of custom o cclusion 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. Click Add
andtheninaviewport,clicktheobjecttoadd.