Posted: Tue, 23rd Mar 2010, 5:57pm
Post 1 of 3
It's a very rare event if your green screen subject is able to match the background perfectly without adding any color grading. I don't have any trouble keying out green screened footage. However, my problem lies within the task of actually color correcting the two layers in order to achieve a realistic look. When I'm trying to correct color, I really have no idea where to start. Is one layer too contrasted? Is this layer too bright, or too saturated? Does this layer need a little boost in gamma? It's difficult to determine what tools I need to achieve a good blend.
So my question: Are there tutorials I can find around the internet that can provide examples for different situations to color correcting? Or does my eye for these corrections improve with experience?
Posted: Tue, 23rd Mar 2010, 6:09pm
Post 2 of 3
You could find some on YouTube.... And yes, you will improve the more you do it....
Posted: Wed, 24th Mar 2010, 5:25am
Post 3 of 3
Yeah, looking around you can certainly find some tutorials. One trick is to start with the contrast. Drop a Grade Object on top of your project, and turn the whole thing black and white. This allows you to clearly see the contrast without color data confusing your eyeballs.
Now, adjust your keyed clip's contrast until it matches the background. You can use Contrast, Levels, Contrast Pro, or whichever tool you want to do this.
Once that is looking good, delete the b&w grade object, and continue with your color adjusting. A good place to start there is checking your color temperature. Any time your background is an exterior, especially, your foreground will likely need some tweaking in that department to get the color temp to match better.
Don't worry about the final look at this point, you want to get your elements and scenes matching decently, then you can do the final grade later on.