Post Process VHS Filter - Shader Graph Basics

Uploaded September 2022 | Updated September 2026, 2 weeks ago

In this post-processing shader video for Unreal and Unity, I show how to add interlacing lines and YIQ color grading to convert our rendered output into VHS quality. Next week we'll add even more techniques to improve the effect.

Here are the vector3 values to use to convert from RGB to YIQ:
0.299, 0.596, 0.211
0.587, -0.274, -0.523
0.114, -0.322, 0.312

And here are the vector3 values to use to convert from YIQ back to RGB:
1.0, 1.0, 1.0
0.956, -0.272, -1.106
0.621, -0.647, 1.703

Here's last week's video on Post Process Action Lines:
youtu.be/joAUbu2_HYg

Here's the playlist of all of the post-process videos:
youtube.com/playlist?list=PL78XDi0TS4lGORvoEKCyw_6dO9tzlu6Ox

Here's the playlist of all the videos:
youtube.com/playlist?list=PL78XDi0TS4lEBWa2Hpzg2SRC5njCcKydl

Shader Book Recommendations
bencloward.com/resources_books.shtml

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Theme Music
Peace in the Circuitry - Glitch Hop
teknoaxe.com/Link_Code_3.php?q=1526

Background Music
Speo - The Little Things
youtube.com/watch?v=aoc9v_TRBqc

#UnrealEngine #shadergraph #Unity

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