Warning: This function is
currently not documented; only the argument list is
available.
Warning: This function is
EXPERIMENTAL. The behaviour of this function, the
name of this function, and anything else documented about this
function may change without notice in a future release of PHP.
Use this function at your own risk.
Shines a distant light on an image to create a three-dimensional effect.
You control the positioning of the light with azimuth and elevation;
azimuth is measured in degrees off the x axis and elevation is measured
in pixels above the Z axis.
Return Values
Returns TRUE
on success.