9

568 Chapter 8: Modifiers
complexity of the geometry. (In general, for a
box object that’s filling a quarter of the screen, a
tessellation of 4x4x4 works well.)
Note: When using the Camera Map modifier, apply
the mod ifier to a single object at a time. If it’s
applied to a selection set, only the first item in the
selection will be mapped properly.
Use Camera Map (WSM) (page 1–513) if you want
to move the camera and maintain the match to the
background.
Using the Pla te M atch/M AX R 2. 5
Rendering Filter
Prior to 3ds Max 3,theantialiasingaffectedonly
geometric edges, with the filtering of bitmaps
being controlled in the Bitmap Map parameters
(pyramida l, summed area, or no filtering).
Antialiasing filters affect ever y aspect of the object,
filteringtexturesalongwithgeometricedges.
While antialiasing provides superior results, it
produces inconsistencies when rendering objects
that are supposed to match the environment
background.Thisisbecausetheantialiasingfilters
donotaffectthebackgroundbydefault.Youcan
turn on background antialiasing in Customize
>Preferences>Rendering>Background
Antialiasing > Filter Background. To correctly
match an object’s map to an unfiltered background
image, you need to use the Plate Match/MAX
R2.5 filter so the texture is not affected by the
antialiasing.
There are three ways you can render objects in
3ds Max to blend seamlessly into a background
environment:
• By assigning a Matte/Shadow Materia l
• By assigning a 100% self-illuminated diffuse
texture to an object using Camera Mapping
• By assigning a 100% self-illuminated diffuse
texture using Environment/Screen project ion
The Plate Match/MAX R2.5 antialiasing should be
used whenever trying to match foreground objects
with an unfiltered background or when trying to
match the antialiasing qualities of the 3ds Max 2.5
renderer.
Procedures
ThefollowingstepsshowhowtoapplytheCamera
Map modifier, and how to set up your scene.
To apply the Camera Map modifier:
1.
Createascenewithacameraandoneormore
objects. Make sure the object you want to map
is visible in the Camera viewport.
2. Select the object, and apply the Camera Map
modifier.
Use the Object-Space Camera Map modifier,
the one without the asterisk.
3. Ifyouhaveanimationinthescene,movetothe
frame where you want the object map to match
the background. For example, if the camera is
animated, the mapping will match only at this
frame.
4. On the Camera Mapping rollout, click Pick
Camera, and then selec t the c amera used for
the rendered view.
To assign a back ground image to the Camera
viewport:
Note:
This procedure is not necessary for successful
rendering, but if you want to see the effect in a
viewport, follow these steps.
1. Activate the Camera viewport and tur n off the
grid.
2. Choose Views menu > Viewport Background.
3. On the Viewport Background dialog that
displays, click the Files button, and choose
thesamebitmapthatyouplantoapplyasa
background for the rendered scene, and as a
diffuse map on the object.