If you take a look at those channels individually, what this does is helps remove noise from the green channel, giving you a cleaner background. This makes it easy to apply to the clip, and will put a slight blur on just the green channel. One of the first things I recommend is consider the blue or green blur. Select the individual clip, and over in Effects and Presets, type in Key.
![using keylight in after effects using keylight in after effects](https://pbblogassets.s3.amazonaws.com/uploads/2019/11/21185803/im-result.gif)
In this case, I've got a shot layered over a backdrop. Let's start with 4,3, which is labeled Keylight. I've opened up a new project that's been set up to make this a bit easier. But let's go in and take a look at the key features here. In fact, you can find additional information over at the Foundry's website, including rich documentation about each feature. Keylight is an Academy Award-winning keyer that was licensed from a third-party company. They do have their place but you never use an adjustment layer with an effect that generates things like Gradient Ramp, Particle systems, or keying because it just doesn't work.- Now that you've gotten a taste at how After Effects works, let's dig in and fully explore Keylight.
![using keylight in after effects using keylight in after effects](https://i0.wp.com/photofocus.com/wp-content/uploads/2018/01/Keying-AE_03.jpg)
Sometimes I will add an adjustment layer with other effects in a nested comp over a bunch of layers that I want to modify if there is transparency in the comp. Sometimes I will throw Curves or some other color correction on an adjustment layer at the top of the timeline to make a global color grading change. The only time you want to use an adjustment layer is when you want to apply same effect to all layers below the adjustment layer. On the other hand, if you want to apply the same effect to layer 1-4 and 9-12 you might not be able to pre-compose all of the layers because 9 through 12 will now be above layer 5 and that could foul things up, but if 1-4 and 9-12 are 3D layers arranged so they don't overlap you can pre-compose all of the layers apply your effect to all of them, then collapse transformations and the 3D spacing will be preserved as will any lighting, shadows, and camera moves in the main comp will still work.
![using keylight in after effects using keylight in after effects](https://i.ytimg.com/vi/TxIzcqhPA54/maxresdefault.jpg)
The efficient way to apply the same effect to layer 5-9 is to pre-compose and then apply the effect to the pre-comp.
#USING KEYLIGHT IN AFTER EFFECTS SKIN#
To remove blue/green spill from the foreground object, use the Despill Bias control to pick skin tones from the source. Use the Screen Color selector to choose a color from the Source input to use as the blue/green screen color and the View dropdown menu to judge the key. Drag and drop the effect onto your footage. Keylight is an industry-proven color difference keyer. Next, search for Key Cleaner in the Effects & Presets window. As mentioned earlier, this view shows you the result without Keylight spill or color correction. To avoid silently resetting these same effect controls on all subsequently loaded projects, save this project and then quit & re-launch After Effects (25::0). First, set the view mode in Keylight to Intermediate Result. When I create slider or IK I get errors: After effects warning: effect control converion required in effect Some effect controls will be reset. You cannot add an adjustment layer above 5 because every layer below the adjustment layer will have that effect. Rather than using Keylight automatic color correction we will use two other effects. Let's say you have 20 layers in your comp and you want to apply the same effect to layer 5 through 9. If you have a bunch of layers and you want to apply the same effect to those layers then that may be an efficient way to go. Would like to know why I get the transparency checkerboard but not true transparency when effects on Adjustment layer. Answer (1 of 3): If you have the entire creative suite available. My thought was that since the lighting and backgrounds are the same, it would be better to use a single Adjustment layer rather than 6 separate applications of the keying effects - though I did see recommendations against putting keying on an adjustment layer on another thread. If I apply the same combo of Keylight, Adv Spill Supressor, and Key Cleaner to individual layers, the keying works as expected, generating true transparency. If I use Keylight (plus Advanced Spill Suppressor and Key Cleaner) on an adjustment layer at the top of the stack, everything keys out properly on each layer, but even though i see the white and grey checkerboard pattern for transparency, I'm not actually seeing through any of the layers to the ones beneath (otherwise I'd see bits and pieces of the performer since not in the same poses for each take - and I verified this bby placing a red solid behind different layers, and I only see through masked out areas, not keyed areas. I then replaced the Premiere Sequence with an After Effects clip, so I have the 6 mov files on top of each other.
![using keylight in after effects using keylight in after effects](https://i.ytimg.com/vi/gp_dw2MS5j4/maxresdefault.jpg)
#USING KEYLIGHT IN AFTER EFFECTS PRO#
I synced up the clips in Red Giant Plural Eyes, then brought them into Premiere Pro CC 2018, where I deleted 5 of the 6 copies of the audio track. I'm working with 6 x four minute mov files of a performer against a greenscreen for a music video (different takes for the same song same lighting conditions)