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364 Chapter 19: Video Post-Production
Add Simple Additive Compositor
Rendering menu > Video Post > Video Post window >
Make su re the two child events are in the order you want
the Image Layer event to use them. > Select the two
events. > Video Post toolbar > Add Image Layer Event
> Choose Simple Additive Compositor from the Layer
Plug-in list.
Additive compositing
TheSimpleAdditiveCompositorcompositesthe
two images using the second image’s intensity
(HSV value) to determine t r ansparency. Areas
of full intensity (255) are opaque; areas of
zero intensity are t ransparent; and areas with
intermediate transparency are translucent.
This layer event can be usef ul when the second
imageisabitmapwhoseformatdoesnothavean
alpha channel.
AddSimpleWipeCompositor
Rendering menu > V ideo Post > V ideo Post window >
Make sure the two child events are in the order you want
the Image Layer event to use them. > Select the two
events. > Video Post toolbar > Add Image Layer Event >
Choose Simple W ipe Compositor from the Layer Plug-in
list.
Wipe reveals an ima ge by wiping from one side to the other,
over time.
TheSimpleWipeCompositorrevealsorerasesthe
foreground image w ith a wipe transition. Unlike
the
Wipe Layer (page 3–345) event, Wipe Filter
wipesacrossafixedimage.
Wipes from image to image (or image to black).
The filtered image stays in place, but is revealed or
erased with a wipe across the image. If you’re usi ng
a Wipe as a Filter event, you’ll usually wa nt to use
anAlphaCompositorasaLayereventaswell.
Atypicalqueuesequencewouldbe: Alpha
Comp ositor (layer)
-->Image #1
-->SimpleWipe(filter)
------>Image #2
Therateofthewipeisdeterminedbythelengthof
theWipefilter’stimerange.Theareanotcovered
bytheimagerendersasblackunlessyouusean