Hello Dave,
first of all thanks for replying.
Sorry, i didn’t think it would be necessary, since the Problem doesn’t exist in all scenes, just in one or two.
Anyway:
– Macbook Pro (early 2008), Mac OS 10.5.8, 2.6 GHz, 4 GB Ram
– After Effects CS 4 – Keylight 1.2
– Nvidia GeForce 8600M GT
– I don’t use Open GL.
– AVID DNxHD Codec
As i said before, 99% of my key in the Project are Ok. I precompose Foreground and Background footage for each Cut/scene, so i can add as much layers for the foreground footage as i need to have a decent key. The problem appears only in one or two scenes of 60 minutes footage. It appears to be darker in the destination composition and in the precomposed composition.
So, i hope i improved my description.
Cheers Oskar