A Beginner's Guide to Alpha & Luma Mattes | After Effects Tutorial



In this tutorial, we will go back to the basics of compositing and learn about Mattes, using ActionVFX’s collections and After Effects’ Alpha and Luma Matte.

High- quality VFX stock footage:
https://www.actionvfx.com/products

Assets Used in this tutorial:
Big Gas Fires
https://www.actionvfx.com/collections/big-gas-fire-stock-footage
FREE Portals
https://www.actionvfx.com/collections/free-portals-stock-footage
FREE Surface Imperfections
https://www.actionvfx.com/collections/free-surface-imperfections-stock-footage
Forest Fires
https://www.actionvfx.com/collections/forest-fires-stock-footage

00:00 Intro
00:26 Introduction to Mattes
00:51 What are channels? (RGB and A)
02:57 Alpha and Luma Mattes explained
06:20 Using Alpha Matte to add textures (Forest Fires)
07:50 Using Luma Matte to create Portal FX
09:46 Using Mattes to add realistic reflection (Surface Imperfection)
12:04 Outro

Bush Texture from:
https://unsplash.com/s/photos/bush

Cambridge plate:
https://polyhaven.com/a/cambridge

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