Bung Alpha Channel

jamesfrankham wrote on 9/1/2007, 10:25 PM

I'm using the old version of Vegas - 7e :)

Has anyone had any problems with alpha channels on PNGs imported from Photoshop. It sees the channel fine, but doesn't alias the edges of type etc making it look awful. However, if you reduce the track transperancy a little - even 1% - it alias's beautifully. Strange.

How do I get it to alias at 100% opacity?

Comments

Shergar wrote on 9/2/2007, 2:47 AM

I too am using 7e, but can't duplicate the problem you are seeing.

I have emailed you an example - let me know if the veg is ok for you. also you could try dropping the png into your own project, to try to isolate whether it's something in your photoshop workflow or your vegas settings

paul

JohnnyRoy wrote on 9/2/2007, 8:00 AM

How is Vegas recognizing the alpha channel? Check the Media tab in the event Properties and try all of the options: Straight (unmatted), Premultiplied, & Premultiplied (dirty). Quite often one will look better than the other two.

~jr

Shergar wrote on 9/2/2007, 8:28 AM

Jr's hit it on the head - setting pre-multiplied alpha on a photoshop png gives exactly the problem you've been getting. Setting alpha to straight should fix it.

jamesfrankham wrote on 9/2/2007, 10:39 PM

It is set on Straight, and no other alpha gives a better result. Am troubleshooting this directly with Paul. Maybe it's a problem with the Photoshop CS2 PNGs.

jamesfrankham wrote on 9/3/2007, 1:46 PM

Many thanks to Paul - who cracked the puzzle. It was saved as an 16-bit PNG which Vegas couldn't deal with. Re-saved as 8-bit and it looks perfect. Thanks again :)