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38 Chapter 17: Rendering
While the method used in R2.5 and subsequent
versions provides superior results, this method
also produces inconsistencies when rendering
objects that are sup posed to match the
environment background, bec ause the antialiasing
filters do not affect the background by default
(FilterBackground=0 in t he [Renderer] section
of the
3dsmax.ini file or Customize menu >
Preferences > Rendering tab > Background group
> Filter Background). In order to correctly match
an object’s map to an unfiltered background
image, you need to use the Plate Match/MAX
R2 filter so the texture is not affected by the
antialiasing.
There are three ways you can render objects to
blend seamlessly into a background env ironment:
• Assign a
matte/shadow material (page 2–1393) .
• Assign a 100% self-illuminated diffuse texture
to an object using
Camera Mapping (page
1–547)
.
• Assign a 100% self-illuminated diffuse texture
using Environment/Screen projection (see
Coordinates Rollout (2D) (page 2–1434) ).
Use Plate Match/MAX R2 antialiasing when
you need to match foreground objects w ith an
unfiltered background, or when you need to
match the antialiasing qualities of the 3ds Max
2renderer.
Pr ocedur es
To set up a n object for motion blur r ing:
1.
Select the object to blur.
2. Right-click the object, and then choose
Propert ies from the quad menu.
TheObjectPropertiesdialogisdisplayed.
3. IntheMotionBlurgroup,chooseeitherObject
or Image.
4. If you chose Image, you can adjust the
Multiplier spinner. This increases or decreases
the length of the blurred object’s st reak.
5. Click OK.
To a dd moti on bl ur when you render the ani mation:
1.
Click Render Scene.
The Render Scene dialog appears.
2. On the Default Scanline Renderer rollout, turn
on Apply in the Object Motion Bl ur group or
the Image Motion Blur group.
• For Object Motion Blur , set Duration,
Duration Subdivisions, and Samples.
• IncreaseDurationtoexaggeratethemotion
blureffect. Decreaseittomaketheblur
more subtle.
• If Samplesis less than DurationSubdivisions,
the slices used are selected randomly, giving
a grainy look to t he blur. If Samples equals
Duration Subdivisions, the blur is smooth.
The smoothest blur results from larger ,
equal values of these two par ameters, but b e
aware that this can slow down rendering by
a factor of three to four.
• For Image Motion Blur, adjust Duration and
Apply to Environment Map.
• IncreaseDurationtoexaggeratethe
streaking. Decrease it to make it more
subtle.
3. Turn on Apply to Environment map to have
camera orbit movement blur the environment
map. This works only with Spherical,
Cylindrica l, or Shr i nk-Wrapped environments.
4. Set other rendering parameters, and then click
Render .