JS4,
What you want to do is very possible. Did you drag your Background into your multilayered image (the animation)? The best way to go about it is in the
Layers Dialog window, select the very
bottom layer of the animation. That way it becomes the active layer. Then drag the Background Image that you want to add to the animation from it's
Layer Dialog window on to the
Animation's Image window. Then using the
Arrow keys in your Animation's Image Layers Dialog window, move your
Background Image (the one you want behind the animation) to the very bottom of the Layer stack.
Next go grab this
excellent script by saulgoode and install it:
http://www.flashingt.../combine-bg.scm
Just right-click on the link above and select
Save Target As or
Save Link As or something similar (depending on your browser) and save it into your Gimp scripts folder. Then refresh your scripts by selecting:
Xtns | Script-Fu | Refresh Scripts
You will now have two new entries under
Filters | Animation. They will be
Combine Background and
Overlay Background.
In this case, you want to select
Combine Background menu selection since you are wanting to add your Background to the animation.
What the script does is make a copy of your Background Image Layer (make sure it is the very bottom layer in the Layers Dialog window layerstack) for each of your animation layers. It then places each Background Layer copy behind each Animation Layer and merges each Animation Layer onto each of the Background Layers.
Once you have applied the script, remove that very bottom
Background Image layer from your Animation Image Layer Dialog window.
Go ahead and select:
Filters | Animation | Playback
If all went well, you will see your animation playing with your chosen Background Image.
Now you can choose to first
Optimize (for Gif) (sometimes this helps reduce the final file size)
or just save it to a GIF file. Oh, don't forget when the
Export Dialog comes up to select
Save As Animation. By default, it will combine all the layers into one, which will effectively ruin the animation. Make sure you select the Save As Animation option. You can leave the other option's default alone in that Window.
Hope this helps some.
:)