Thank you for the link, but i don't think that does the same thing. Its still premultiplying the alpha, just onto black instead of white. My target is untiy so it gives a good view of the rgb and a channels. If i save a psd an import it shows the rgb pixels are stretch/expanded at the edgesso when the alpha channel is applied, the correct color is used for transparency. If I save the same psd as a tif, then import i dont get that stretch/expand from the edge pixels, so when the alpha channel is applied it gets the color of whatever the background is. I can run some scripts to expand those edge pixels out so the correct color is used, but i was hoping there was something in the tiff save that would do the magic for me in the same way the psd files are saved
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