Not sure how many people are still using the animated sky textures but I tried my hand at one and it didn't come out too bad. Here is a screenshot of the texture applied ...
and the texture is a tga so just right click the link and 'Save Target As ..."
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ICQ: 242543712
Ich bin nicht hier und bin nicht da.
Wo bin ich dann?
".."
("")
^ ^
This is the evil vampire bunny. Copy and paste him into your signiture to help him achieve world domination. Yeah
EDIT ==== I use PaintShopPro and draw 2 different pictures (128 x 128) then put them on a new picture frame (256 x 128), save it to a .tga file. when I add it to my WAD, I can't see it animate like you did.