after effects cc更换背景幕布:[1]keylight
1、添加特效键控 keylight(1.2)
![after effects cc更换背景幕布:[1]keylight](https://exp-picture.cdn.bcebos.com/8974c38a59de450740d971c35e413a8ca708856f.jpg)
![after effects cc更换背景幕布:[1]keylight](https://exp-picture.cdn.bcebos.com/e40b3127e7ef2806b2d9db6eb840b6f39087f26f.jpg)
4、单击视频背景幕布的绿色,会看到绿色消失了
![after effects cc更换背景幕布:[1]keylight](https://exp-picture.cdn.bcebos.com/a9338a1fbee434da17860390f271fe1d97d8e46f.jpg)
5、然后我们效果空间里面的view的screen matte模式
![after effects cc更换背景幕布:[1]keylight](https://exp-picture.cdn.bcebos.com/bab5c45872dade4999d7c2e526042e6816e9d56f.jpg)
6、进入screen matte后,在screen Gain与Screen balance中进行微调(如下图)
![after effects cc更换背景幕布:[1]keylight](https://exp-picture.cdn.bcebos.com/d9a8d2d2bb665159839959998fe23ea23b42c76f.jpg)
![after effects cc更换背景幕布:[1]keylight](https://exp-picture.cdn.bcebos.com/3fe32442a07aa010b1eaa58bbfbb19efa35f3e6c.jpg)
![after effects cc更换背景幕布:[1]keylight](https://exp-picture.cdn.bcebos.com/35fa07efa25f0c14d1a29b310d89a146b6b1386c.jpg)
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