Here we will work on a spotlight type effect for masking.
There is also another possibility of masking at the
Text Fades effect page.
Create 3 layers in your main movie. On the top layer
type your text. Copy your text and paste it into the
bottom layer using the Edit > 'Paste In Place' command.
This way you don't have to worry about lining the text
up.
The concept behind this is that the top layer will mask
the second one thus 'blocking' the fill from going outside
your text edges. Well if you didn't have the bottom
layer with the text in it you would get something.
Yea it looks kinda cool, but most of the time you want
something you can read all the time. By placing another
layer of text and the bottom that has nothing to do
with the mask, allows you to get the effect. So you
have 3 layers working together.
1) The top which is masking the middle layer (making
it to where it does not go outside the text edges)
2) The middle layer which has the moving fill
3) The bottom layer that leaves the text up all the
time
Now, those two layers are finished! All we need to do
is work on that fill. Start by drawing a fairly large
circle in the middle layer. Fill it with a radial gradient
that is colorful in the center and 'clear' (100% Alpha)
on the edges. Fill your circle and delete the outer
edges.
Now add a motion guide to the middle layer. With the pencil
tool draw the path you want it to follow (just to make
it easy.. you can just tween the fill straight across
the middle layer). If you will use the motion guide
the only think left to do... is to grab your fill on
the first frame and 'Snap' it to the beginning of your
pencil line path. (Make sure View > Snap option is
on).
Create a keyframe about 15 frames down and paste your fill
into it except this time.. Snap it to the end of your
line.
The last step is to mask the two top layers. So, select
the first layer properties... and on the menu select
'Mask'. And that should be it. You'll have a couple
of icons next to the top two layers.. showing that they
are masked.
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