Blackmagic Forum

Hi,

I'm wondering why the darken slider in the levels on the CC node affects every node connected to the comp, instead of just the specific node it's connected to. I have a Camtasia video, but I'm not allowed to post links until I reach a certain number of posts. And it keeps kicking my attachment back.

Thanks, Morgan

you need about 5 post for links, but maybe you can describe the problem a bit more in depth?

Absolutely. So after I have put together all my render elements in Fusion, I want to have control of each specific one, with the CC tool in particular. Which is generally not a problem, until I use the slider of the levels tab on the left-hand side. It darkens the entire image, not just the loader I've connected it to.

ok, i guess you work with float images

changing the black point (moving the slider in the levels to the right) results in negativ color values. the new value of the slider becomes 0 and everything below is now a negativ value. nothing is lost in float.

if you now merge the other passes over the negative values you get a darker result as if there was black (or 0): -0.04 + 0.8 = 0.76

to prevent this you could use a Brightness/Contrast to adjust the black level and check "clip black" or just add a Brightness/Contrast with just the check "clip black" as a clamp node behind the CC

Brilliant, thank you!