Hi,
I looked thru the help and still can't get this to work in V15 (and V13).
In AE (cc2015), I render out an alpha channel (lower thirds)..tried both uncompress AVI and quicktime..selected ALpha..render..in vegas I put the clip on the timeline, go into properties for that clip and select Media, then in the Alpha Channel I select Premultiplied.
https://vimeo.com/274010854/be7a59d340
Any ideas???? thanks