Colour Correction -Questions

[macool]

Hello All: I know this is somewhat of a basic skillset yet I need some advice as I continue to learn new compositing techniques:

I need to do colour corrects for ALL 3D cg layers (No video -nor film) and do overall corrections as well, I need some help for this....

Example: Lets say I have 10-15 cg layers and they EACH need some sort of correcting(brightness/CC,etc.), and then I want to do an overall colour correction for the final comp at the end of the flow. Is this a per layer technique and then a do the final CCs?? Is there a workflow method that might help me in getting the best looking results without adding too much, too little and or canceling out corrections? ...Hope I explained this well.

Thanks again!!

[dapeter]

Well, since I'm assuming you're using Fusion, it's really simple. Fusion is node based, where the images flow from one node to the next. So, put loaders for all your CG items. Add a CC after each one and adjust to your heart's content. Then after merging all the layers, add a CC node to correct the overall comp.

[loops]

Anyone know if CC nodes concatenate in Fusion like they do in Shake, when you're working in 8 or 10 bit?

[softer]

yes everything that can be concatenate in fusion is. In this case all the 15 cgi individual CC and the one overall CC is concatenate into a single CC calculation, so it´s not a performance hit. But it´s not that good after all, because you get the merge operation inbetween the individual CC and the overall CC.

[dapeter]

The CC nodes won't concatenate unless directly feeding into one another (same with Shake):

"Fusion's workspace will take into account adjacent transforms and concatenate values whenever possible. As in Shake, its important to keep in mind that processing nodes in-between transforms break this capability. "Whenever I start out teaching Fusion -- or even with experienced artists," says Eyeon's Isaac Guenard, "I emphasize that it is best to do your color corrections in a row and then apply transformations." ( http://www.fxguide.com/article315.html )

So, the merge node breaks the concatenation. Logically with multiple CC's on different layers the CC cannot concatenate since you're performing totally seperate color math on different parts of the image.

[Vympel]

yes everything that can be concatenate in fusion is. In this case all the 15 cgi individual CC and the one overall CC is concatenate into a single CC calculation, so it´s not a performance hit. But it´s not that good after all, because you get the merge operation inbetween the individual CC and the overall CC.

I believe that Fusion only concatenate the transform nodes, not the color nodes like the shake

[loops]

You could strap two CC nodes onto each layer then link all the second nodes together to get a master CC, right? How does one do that in Fusion? Is there a way to link or clone whole nodes, or do you do it parameter-by-parameter?

[Vympel]

You could strap two CC nodes onto each layer then link all the second nodes together to get a master CC, right? How does one do that in Fusion? Is there a way to link or clone whole nodes, or do you do it parameter-by-parameter?

You can paste node like a instance (one node is linked to other node)

This video show many tools of CC of Fusion

http://www.eyeonline.com/Web/EyeonWe...ion5_Color.mov

[softer]

fusion does concatenate colour nodes, they just have to be in a unbroken order one after the other.

[loops]

Cool. Thanks all.