Color Corrector messing with white levels

Has anyone noticed the color corrector filters messing with white levels? Simply adding the filters at their defaults will bring the white levels down on our scopes, and make the excess luma overlay happy. Then we'll color correct, and make sure whites are broadcast safe. Everything looks fine. But once we render, the white levels are completely different from what we rendered. It's frustrating. Shifting the color sticks. I'm not sure if it's just the whites, but that's the most noticeable.
This is happening on both of our stations here.
Any ideas?

We have a Kona 2 card on one machine, Blackmagic card on the other.

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www.JamesNWeber.com - Socially Aware Media

and introducing-
www.FCPTutorials.com - One source for all Final Cut Tutorials

Which filters? Color Corrector? 3 Way Color Corrector?

Yeah, I see a very slight shift in the RGB Parade. Noticeable on the scopes, but nothing to the eye.


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Both filters seem to do it. This isn't noticeable to the eye, but parked on any particular frame, the scopes will be very different after rendering.

----
www.JamesNWeber.com - Socially Aware Media

and introducing-
www.FCPTutorials.com - One source for all Final Cut Tutorials

Which version of FCP are you using?

A while ago I did mention seeing a shift in black levels before and after rendering on some clips.

[www.lafcpug.org]

If you are working on HD clips in an SD timeline, the levels will shift before and after rendering.



www.strypesinpost.com

strypes Wrote:
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> Which version of FCP are you using?
>
> A while ago I did mention seeing a shift in black
> levels before and after rendering on some clips.
>
> [www.lafcpug.org]
> 9597#msg-229597
>
> If you are working on HD clips in an SD timeline,
> the levels will shift before and after rendering.

It's the latest version of FCP (6.0.5?). It's DVCPRO HD 1080i footage in a DVCPRO HD 1080i timeline.

I don't have dvcproHD 1080 footage to try that on. You don't happen to have any fxplugs in the filter stacks, right? Eg. Vignette, etc.. That can cause a shift in white levels before and after rendering.



www.strypesinpost.com

strypes Wrote:
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> I don't have dvcproHD 1080 footage to try that on.
> You don't happen to have any fxplugs in the filter
> stacks, right? Eg. Vignette, etc.. That can cause
> a shift in white levels before and after
> rendering.

No fxplugs. I should run some more tests and see if it's any filter at all, or what the deal is. I'll let you know if I have time tomorrow.