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.
Returns a grayscale image with a three-dimensional effect. We convolve
the image with a Gaussian operator of the given radius and standard
deviation (sigma). For reasonable results, radius should be larger than
sigma. Use a radius of 0 and it will choose a suitable radius for you.
Return Values
Returns TRUE
on success.