I created a 3d duck with png alpha feathers. I merged feathers to the body of the duck. Cycles rendered preview is cool but when I export the feathers take the unalpha texture of the body (not of the feathers)
I am not too sure what you mean with the last 11 words...
Next time you upload a scene, especially if the topic is the textures, please import the textures into the file with "File -> External Data -> Pack all into .blend". I looked at the unwrap of a single feather and depending on your texture, this could be broken (besides from the triangulation, which is weird but not causing the problem, you are unwrapping a rectangular shape to a square):
Also please state to which format you are exporting. Could be that, as you got 25 different materials on that duck, the file format does not support that? (Which doesnt seem to be the case here, just a thing to think about)
(PLEASE DONT DOWNVOTE ME, THIS MESSAGE IS TOO LONG FOR A COMMENT, I KNOW ITS NOT AN ANSWER AS IS, BUT I WANTED TO POINT ALL THAT STUFF OUT)