G+ user Andreas Katifes has posted a new PhotoFlow video tutorial, in which he goes through some examples of creating complex layer mask shapes by combining two or more shapes in multiply and/or screen blend modes:
https://plus.google.com/+AndreasKatifes/posts/fq95gkaX4bs
Here is the direct YouTube link.
All available tutorials are collected in the PhF G+ community: https://plus.google.com/communities/108772952003062961576/stream/69429669-4a79-4834-b161-f55b3512e45c
Enjoy!
