Legacy ImageMagick Discussions Archive

I've noticed a weird behavior. If I chose a name for the resulting image that's based on the name of the source image, the composition just gives me the source image. If I chose something else, like: blah.png. It works. All things the same, the file name is the only thing I'm changing.

Even with the command line tool, I can't make it work at all in any visible way.
Here's the "alpha" image:
http://mhayesdesign.com/ahl_alpha.png

And the image I want to mask:
http://mhayesdesign.com/4308129_64_close.jpg

To use an image as an alpha channel, you need to use the equivalent of ...

This is the effect that I'm going for. I thought I wanted to create an "alpha" image to do the cut. Not sure now.

http://mhayesdesign.com/help_with_mask_cut.jpg

I'm using rmagick. I though that was what I was going for:
source = mask = Magick::Image.read("source_image.jpg")
mask = Magick::Image ...