Helgi,

without having material (meaning material like yours) at the moment to
*practically* do this, I can only give you the more or less
*theoretical* take on this.


> Problem is when the logo is fading up, it's semitransparent greyish
> color instead of semitransparent green, because the fill is fading up
> from black, instead of being opaque all the time, letting the matte
> only control the transparency.


Yupp, THAT'S your problem. It's of course utterly silly to be fading
the fill when that's what the MATTE is for.

What you did in AE could or rather would need to be done pretty much
the same way (as I said, not having the material in front of me) only
using "Image Matte" and e.g. "Matte Magic" or the likes.


> It could all have been avoided if the fill didn't fade up or they
> could've simply burned a CD with a quicktime with an alpha channel.


That sums it up perfectly actually. And if getting either (a NON-
fading fill or QT with alpha) is not an option, I'd say the way you
are doing it is pretty much the best way possible.

cheers,
Robin