Sorry, this is a Pr issue. I'm posting here because I wonder why it's not an Ae issue. Let me explain.
I'm getting these little crosses in zero black areas using Magic Bullet Looks on an Adjustment Layer.
Here's a screen grab:
I'm getting this in Pr 601, MacPro3,1, 10.7.4, Quadro 4000. The footage is ProRes4444 recorded from Arri+Cinedeck
This is some interaction with the Pr Levels effect on each clip, where I've taken the linear footage, and expanded the black (and white) levels to 0-100.
Turning off GPU in Looks prefs gets rid of them, but then rendering takes 10x as long. I pasted my timeline from Pr into Ae. Applied MBL to an Adjustment Layer, and the problem does not repeat in Ae.
I deleted the first instance of MBL in Pr, and applied a fresh Looks setting. The crosses come back, but much tinier, even with no changes made in the MBL GUI.
I tried trashing Looks prefs, Pr prefs, reboot, reinstalled CUDA and nVidia card drivers. This only started recently after using Looks with the same setup ever since CS6 came out.
I have discovered a workaround, but it's not perfect. If I set each instance of the (RGB) Black Output Level on the source clips Levels Effect to 1 instead of 0, the crosses go away.
I surmise this is perhaps a sub-black warning in Looks? I'm wondering why I haven't seen it before, and why I don't see it in Ae, even if I force the black in the source clip to less than zero, followed by MBL.
I believe that Pr doesn't allow sub-black, but Ae does. This may be why I can't repeat this issue in Ae.
Thanks,
Jim C.
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