Anthony Thyssen wrote:

> 
> $earth->Write('show:');
> $earth->Write('earth.png');

Hmmm, I got this odd error (IM 6.3.2):

        display: unrecognized option `-window_group'

I can't find any documentation on 'show:', but I guess this causes the 
direct display of the image.  In that event, this replacement for the 
above two lines does works for me:

        $earth->Display();

BTW, the Linux version that works for me is:

        #!/usr/bin/perl
        #
        # Command Line equivalence
        #   convert aardebolletje3.png aardebolletje-mask.png \
        #           +matte -compose CopyOpacity -composite \
        #           -write show:  earth.png
        #
        use strict;
        use Image::Magick;

        my $earth=Image::Magick->new();
        $earth->Read("aardebolletje3.png");

        my $mask=Image::Magick->new();
        $mask->Read("aardebolletje-mask.png");

        $mask->Set(alpha=>"Off");

        $earth->Composite(
                image => $mask,
                compose => 'CopyOpacity',
                );

        # Remove Write('show:') due to following error (IM 6.3.2):
        #   display: unrecognized option `-window_group'.
        #$earth->Write('show:');
        $earth->Write('earth.png');

-- 
dnl
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