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366 Chapter 19: Video Post-Production
Inter face
The Properties panel is divided into two sections:
Source and Fi lter.
Source group
Specifies the objects in the scene to which a glow
is applied. You can select more than one source
option at a time.
Whole—Applies a glow to the w hole scene, not just
a particular piece of geometr y. This m akes each
pixelinthesceneapotentialglowsource. The
areas of the scene that have glow applied to them
are deter mined by the settings in the Filter section
of the dialog.
Object I D—Lets you apply the glow to an object or
part of an object with a specific Object ID (in the
G-buffer (page 3–946)), if the object matches the
Filter sett ings. To apply an Object ID glow for an
object, r ig ht-click the object and select properties
from the menu. Then, set the Object Channel ID.
Set this field to match, and Lens Effects glow will
apply the glow to that object and any other objects
withthesameID.Thisparametercanbeanimat ed
(page 3–349).
Effects ID—Lets you apply the glow to an object
or part of an object with a specific Effects ID, if
the object or part of the objec t matches the Filter
settings. You apply a Effects ID in the Materials
Editor by assigning the material to one of the
available Material Effects channels. T his parameter
can be animated.
The glow will be applied only to areas of the
geometry where the ID is present.
Note: To apply different glow sett ings to different
pieces of geometry or IDs, add more glow entries
to the video post queue. Set each glow entry to
affect a different Effect or Object ID, and set the
appropriatesettings.Thisprocesswillcalltheglow
routine multiple t imes, increasing your rendering
time. Try to keep the number of glow routines to
aminimumperframe.
Unclamped—An unclamped color is brig hter than
pure w hite (255,255,255). 3ds Max keeps tr ack
of these "hot" areas w hich tend to show up when
your scene contains bright metallic hig h lig hts or
explosions. This spinner lets you determine the
lowest pixel value that is glowed. Pure white has
a pixel va lue of 1. When this spinner is set to 1,
any pixels with a value above 255 will be glowed.
You can invert this value by clicking the I button
totherightofthespinner.Thisparametercanbe
animated.
Sur f Norm—Glowspartofanobject,basedonthe
angle of the surface normal to the camera. A value
of 0 is coplanar, or parallel to the screen. A value
of 90 is normal, or perpendicular to the screen. If
you set Surf Norm to 45, only surfaces w ith normal
angles g reater than 45 degrees will be glowed. You
can invert this value by clicking the I button to
the r ight of the spinner. This parameter can be
animated.
Mask —Glows the mask channel of an image. The
spinner va lue represents the level of grayscale
presentinaMask. Whenthisisset,anypartof
the Mask images larger than the set value will be
glowed in the final image. You can invert this value
by clicking the I button to the right of the spinner.
This parameter can be animated. R ange = 0 to 255.