From the course: After Effects Compositing: 4 Color Keying
Unlock this course with a free trial
Join today to access over 22,400 courses taught by industry experts.
Feather edges with Channel Blur - After Effects Tutorial
From the course: After Effects Compositing: 4 Color Keying
Feather edges with Channel Blur
- So if you're finding that refined soft matte is not worth the extra overhead and trouble to tweak it and you're looking for a simpler option to refine your matte extraction I would suggest a couple of very simple ordinary tools. One, to feather the mask and the other to just control the threshold angle a bit further. So for this I'm going to zoom back in on the tree and turn off the background. So again we have a bit of thresholding here but it's a bit chunky and so to feather that hidden among the blur effects is channel blur. Now if I go heavy on this not only does it not look right but you're going to see something that I need to do here which is set repeat edge pixels use at full frame. I'm going to use this sort of very very low level. In fact, by turning on the modifier key, holding down command because I'm on a Mac I can increment by tenths and that's about right. Now this is different from altering the threshold with extract because I'm taking the threshold that was already…
Practice while you learn with exercise files
Download the files the instructor uses to teach the course. Follow along and learn by watching, listening and practicing.
Contents
-
-
-
-
-
-
-
-
High-contrast mattes: Introduction57s
-
Create a luma key with Extract3m 27s
-
Set up a simple sky replacement in 32 bits per channel2m 38s
-
Improve detailed edges with Refine Soft Matte3m 29s
-
Feather edges with Channel Blur3m 26s
-
Conceal matte lines with an edge matte4m 37s
-
Expand and contract a luma matte with Minimax2m 9s
-
-