Adobe 25510629 - After Effects CS3 Professional, Руководство пользователя

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Layers, inputs, and virtual sets 25
The “Corner Office Monitor to Talent - Pause at Beginning (Trak) Sitting” virtual set is one
of the most complex sets in all of the Master Sets Libraries. This virtual set starts with a pause
point on an inset, and then performs a virtual camera move to the subject, which is
composited between two predefined layers: a desk in front and a wall of windows behind
looking out on a cityscape.
A Master Set is a collection of virtual sets with a unified appearance and layout, each of which
is essentially a different perspective on the same 3D environment. A virtual set file from one
of the Master Sets Libraries (MSLs) defines a group of inputs and their positions, some of
which are predefined and others of which you assign. Designations for insets are consistent
throughout a Master Set. For example, Source D in one set is in the same relative position in
any other set from the same Master Set that uses a Source D. That’s why the insets in some
sets do not start at Source B.
The virtual sets provided with Ultra have a file extension of .mfx.
Each virtual set has a native frame aspect ratio. In most cases, you should match the frame
aspect ratio of the virtual set to the frame aspect ratio of the session as set on the Output tab.
However, Ultra lets you mix them if that suits your purposes. You will find 16:9 sets in the
Basic folder on the Virtual Sets tab.
The name of a virtual set provided as a part of the Master Sets conveys the following
information:
The first word or two indicates the master set to which the virtual set belongs.
This is usually followed by a description of the shot, typically the camera number or
position. VirtualTrak sets are an exception, with names that typically describe the camera
movement (for example, “Monitor to Stage” or “Dolly to Bookcase”).
This is followed by text that indicates if there’s a foreground element or if the VirtualTrak
shot includes a pause point. For more information, see
“Setting a pause point for a
VirtualTrak effect” on page 107 .
NO
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With the exception of those sets labeled 16x9, Ultra Master Sets use a 4:3 frame aspect
ratio. For instructions on converting this aspect ratio for a widescreen session, see
Tutorial #15 “Using 4:3 sets in a 16:9 project” on the Ultra support website,
www.adobe.com/support/ultra .
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VirtualTrak is a proprietary feature included in some of the Ultra Master Sets Libraries. It
provides virtual camera movement with a more realistic tracking motion than standard
pan and zoom. This movement is not reproducible in custom-built virtual sets. Ultra
virtual sets with “Trak” in the title have VirtualTrak functionality included.