This lesson covers the practical process of keying out a green screen using tools like the Keylight effect in After Effects, considered an industry-standard keying plugin. You’ll learn how to select the correct green shade, adjust screen matte settings to clean up rough edges, and preview your key against different background colors to spot leftover green fringing. Fine-tuning settings like “Screen Gain” and “Screen Balance” helps achieve a cleaner, more natural-looking key, especially around fine details like hair.