Genius EYE 312 - Creating Avatar Model - Anchor Points; Background Mask Editing; Brush Tool Usage

English
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4. Background Mask Editing : Modify the mask of the image
(also known as alpha channel) to specify the none-effect part of
the image.
o Brush Tool:
Increase
: To enlarge the background area in the
image.
Decrease
: To erase parts of the background mask.