This is not a GIF transparency issue. You need to add 'hollow' to the union
"butterfly2" otherwise the media showing through it is not rendered, which
causes the artifact you see.

Also, you should not post a scene file or a binary attachment in this group.
Please see povray.announce.frequently-asked-questions for posting guidelines on
this server.
It would be polite to at least try to make the example scene shorter and easier
to read.

Margus

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