Chapter 6 – Matte Creation and Manipulation Home Page › forums › Art and Science of Digital Compositing › Chapter 6 – Matte Creation and Manipulation This forum has 1 topic, 5 replies, and was last updated 13 years, 3 months ago by Ramazan. Viewing topic 1 (of 1 total) Topic Voices Posts Last Post Premultiply or separate alpha channel? Started by: Rusty Robbins 5 6 13 years, 3 months ago Cindy Dolan Viewing topic 1 (of 1 total) You must be logged in to create new topics. Log In Username: Password: Keep me signed in Log In