Game Development Reference
In-Depth Information
Figure 9.9 Reducing the Alpha
Obstacle value forces the
lightning to be contained within
the opaque pixels of the layer.
If you move the Alpha Obstacle value to a positive number,
then the lightning will wrap around the alpha channel of the layer
it's applied to (Fig. 9.10).
Figure 9.10 When the Alpha
Obstacle value has a positive
number, the lightning stays in the
transparent pixels on the layer.
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