Game Development Reference
Figure 17.51 With the Phase
value at 180 degrees, every other
column shifts vertically, creating
this effect to create patterns and large numbers of objects from a
The Posterize Effect
The Posterize effect reduces the number of colors in an image,
which often creates hard transitions between colors. When I fi rst
started learning digital arts, this was usually a very poor feature.
But in modern times, edgy lo-fi art is very popular. Often, art in
this style is vector-based, like the art created in Adobe Illustrator.
In this example, we're going to use the Posterize effect to help us
create some trashy, urban, street style art with apparently fl at
color. For an even more dramatic effect, check out the Threshold
effect at the end of this chapter.
Import the CED113.mov clip from the Artbeats folder in the
Media folder of the exercise fi les. This clip contains a high qual-
ity aerial shot of a big city—perfect material for posterized, edgy
graphics. I'm going to drag the Current Time Indicator out to 7
seconds and 14 frames (0; 00; 07; 14) (Fig. 17.52).
Then I apply the Posterize effect. While the default results
apply some degree of posterization, it's not nearly enough. The
default results remind me of bad web graphics from the late
1990's. So let's adjust the Level value, which is the only parameter
in this effect. With the Posterize effect, high Level values create a
smoother result, eventually making the posterized image resem-
ble the original footage. Ironically, reducing the Level value actu-
ally increases the posterization effect by reducing the number of
colors used (Fig. 17.53 ).