Michael Pavlovich - Pavlovich Workshop - Episode 35 - YouTube
FlippedNormals on Twitter: "Finally there's a good feather IMM brush for ZBrush! The feathers are based on the tail, wing, belly, back and beak feathers and are well suited for realistic ZBrush
FEATHERS IMM CURVE BRUSH BUNDLE
Stylized Feather Brushes for Zbrush - FlippedNormals