Today we're talking about chroma keying, specifically focusing on the **Keylight** effect.

**Keylight** is an effect that helps you remove a green or blue screen from the background of your video clip.    

This gives you the ability to **change the background** of a subject shot on a green screen or use any footage from the internet that has a similar setup.

Chroma key is often used in visual effects. It’s typically **green or blue** because these colors are completely opposite from human skin tones on the color spectrum. If you want to shoot green screen videos yourself, make sure you have proper lighting.   
Your subject should be as far from the green screen as possible, and the background should not contain any shadows from the subject.

In post-production, keying is a very precise process, but we will cover just the basics today.


**In this chapter, you've learned**:
- How to remove backgrounds using the Keylight effect;
- Key Keylight parameters to adjust for better results;
- How to refine keying with masks and duplicate layers.


## Homework 

Cut out green screen from the clips and place it on any background.


Why is green or blue typically used for chroma keying in video production?

This course provides a comprehensive introduction to Adobe After Effects, covering essential tools and techniques for animation, motion graphics, and visual effects. You'll engage in precise practice, learning to create full animations and advanced transitions in dedicated chapters. By the end, you'll have the skills to craft dynamic animations and high-quality video content through hands-on projects.

You'll explore the core interface and functionality of After Effects, learning how to navigate compositions, layers, and essential tools. You'll also learn how to organize your projects effectively and gain a strong understanding of basic transformations, laying the groundwork for more complex animation tasks.

This section focuses on mastering key animation principles, such as keyframing and easing, along with learning to create a complete animation on a real example in a dedicated chapter and making motion graphics transitions in another.

Now you'll explore more advanced features such as chroma keying with the Keylight effect, using masks for refining effects, Adjustment Layers for applying effects to multiple layers, and pre-composing for better project organization. Additionally, you'll practice creating professional transitions, perfecting techniques like zooms and whip pans, with an emphasis on precise execution.

Adobe After Effects Basics

Keylight

Mentioned shortcuts

Homework