Graphics Programs Reference
In-Depth Information
You can change the length of strokes using the Lifetime Type property in the Lifetime tab
( FIGURE 6.8 ) ,thedrop-downmenu,orthebuttons(thefunctionalityisthesame).Theop-
tions are:
AllFrames: Meaningallframes,beyondyourcomposition,toinfinityandbeyond.
Start To Frame: From the beginning of the sequence to the current frame.
Single Frame: Just the current frame.
Frame To End: From the current frame to the sequence end.
Frame Fange: A defined start and end.
Figure 6.8. Lifetime properties.
Now, click the All Frames button. Your last stroke now exists throughout the clip and
beyond—infinitely. Even if you now make your comp longer, the stroke will be there, no
matter long you make the composition.
Painting in vectors
You can do changes on the fly in Nuke because the RotoPaint system is vector based. In
other words, pixels aren't really being drawn by your mouse strokes. When you “draw” a
stroke, a path is created called a vector, which mathematically describes the shape of the
stroke. You can then use this vector to apply a paint stroke in any number of shapes and
sizes, and, for that matter, functionality. This means you can change your paint strokes
after you draw them, which is very powerful and saves a lot of time.
Tobeabletochangestrokesettings aftertheyhavebeencreated, youneedawaytoselect
strokes. You do that in the Stroke/Shape List window, also called the Curves window
( FIGURE 6.9 ) .
Figure 6.9. The Stroke/Shape List window.
 
 
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