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352 Chapter 19: Video Post-Production
The G-Buffer ID can b e any positive integer.
If you give the same G-Buffer ID value to
more than one object, all these objects will be
post-processed.
Edit Negative Filter
Rendering menu > Video Post > Video Post window
> Selec t a Negative Filter. > Video Post toolbar > Edit
Current Event > Setup
Effect of negative filter
The Negative Filter inverts the colors in t he
image, making it negative like a negative color
photograph.
When you click the Setup button in t he Edit Filter
EventdialogfortheNegativefilter,theVideoPost
dialog is replaced by a modeless Negative Filter
dialog with a Blend spinner. You can turn on
AutoKey,movethetimeslider,andchangethe
Blend value to create keys. (You can also use other
3ds Max functions; for example, you can create
objects.) When you’ve set all the keys you want,
click the OK button to retur n to Video Post.
AftercreatingkeysfromtheVideoPostfilter,youll
find the track for the new keys as a child of the
Video Post track in the Track View Curve Editor.
Specifically, in the above example, you’ll find the
following hierarchy in the Curve Editor:
Interfa ce
You can set the following:
Blend—Sets the amount of blending that occurs.
Edit Pseudo A lpha Filter
Rendering menu > Video Post > Video Post window
> Select a Contrast Filter. > Video Post toolbar > Edit
Current Event
The E dit Pseudo Alpha Filter creates an alpha
channel for the image based on the image’s first
pixel (the upper-left corner pixel). All pixels
that have the same color as t his pixel become
transparent.
Because only one pixel color becomes clear, edges
oftheopaqueareasarealiased.Themainusefor
this filter is when you want to composite a bitmap
whose format does not have an alpha channel.