This may be more a GIMP question than an SL question but given our scientific leaning I figure maybe someone has run into this.

I'm trying to use SL's version of GIMP (SL 4.1; GIMP v2.0.5) to combine several astrophotographs into a final image.  For those new to the process of digital CCD astrophotography, rather than take one long exposure (for deep sky objects) several shorter exposures are taken and post-processed using imaging software such as Adobe PhotoShop to "merge" the images into a final picture.  The essential technique is to introduce each photo as a layer and flatten the image to combine corresponding pixels to create a brighter rendition.

When I use layers in GIMP's Layer Dialog, I can freely create (empty) layers and see them stacked one over the other above the background image.  But when I attempt to do the same thing when inputting the images, the layers dialog behaves differently.  Each new image is displayed above the background layer, displaying only two layers.  I can see the images loaded and they are all assigned a distinct layer.  It's the Layers Dialog that fails to show all these layers stacked above the background.

Is this a bug or a feature?  Is this layering-of-existing-images something that GIMP can do?  Or am I expecting too much?

r.m.
(a GIMP newbie)

(you may respond to me directly)


 
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