I was told to output DPX with alpha ( foreground and background )
Of a composite for color and later DCP
When we import to AE all is fine if we choose alpha straight
When we import at the post studio (not AE, we get kind of a dark edge on the transparency of an object)
Same happens when importing to AE and not choosing "Straight" , so it might be the rendering itself.
So bottom line: DPX with alpha to someone who has no ability to choose Straight/Premultiplied/etc.
I would appreciate any tip