Pffff, I accidentally deleted the post about my problem with adding transparent stars on a blue background in premiere.
But thought it would be nice to let you know how i solved it:
First i exported as Quicktime animation millions + colours.
Alpha channel worked fine, but i had some stars fading to 100% transparent over time. Looked fine in TB, but in Premiere, the yellow stars went to dark grey before they disappeared into transparency.
I do not want the dark grey! Where does that come from?
Someone suggested it is because of pigments of adding yellow to blue background. But that was not the problem. Still don’t know why quicktime does this, but :
Render a PNG sequence!
Now it looks how i wanted it to look.
(still we got some mixing of yellow with blue, but thats acceptable. And the dark grey is gone :))