Game Development Reference
THE PAINT EFFECTS
This is a wacky category of effects. One effect (the Paint effect)
isn't really an effect, per se, and the other effect (the Vector Paint
effect) is somewhat obsolete. But we'll cover both the effects here
because of the importance of painting in After Effects. Using
painting tools and effects, we can rotoscope, cover blemishes,
add objects, create motion graphics, and much more.
The Paint Effect
The Paint effect is similar to the Puppet effect that we looked at
in Chapter 7. It's not really an effect on its own, just a vehicle that
the painting tools in After Effects use to apply paint to a layer.
Many users of After Effects probably paint on their layers, not
realizing that an effect has been applied in the process.
When the Paint effect is applied to a layer, all the power and
control of the After Effects paint engine is available in the Timeline
panel. There is only one parameter that is adjustable on the effect
itself in the Effect Controls panel: Paint on Transparent. This is a
pretty helpful option, so let's talk about what it does. To follow
along with me, you can open up the Paint.aep project from the
Chapter 14 folder of the exercise fi les. This is a simple layer that
contains a sweet mask from one of the new symbol libraries in
Illustrator CS4. Apply the Paint effect to this layer by double click-
ing the red solid layer to open it in the Layer panel, selecting the
Brush tool in the Toolbar at the top of the interface, and then paint-
ing on the layer in the Layer panel. I drew some angry fi re coming
out of the mouth of this griffi n, even though that doesn't make too
much sense from a mythological standpoint. Monsters are just so
much cooler when they breathe fi re. Deal with it (Fig. 14.1 ) .
Notice how we can see both the paint strokes and my original
layer. But what if I wanted to paint on this layer and only have my
paint strokes visible? Selecting the Paint on Transparent option
on the Paint effect in the Effect Controls panel will make the con-
tent of the layer disappear so that all you see is the paint that you
added to the layer (Fig. 14.2).