Badger Blender Brush #4 - M.Grumbacher "Lighty Used" Heritage brush, no longer manufactured. Excellent for blending oils. $25.00 (retail 49.99)
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Texture et masque de texture — Blender Manual
CR Basic Brushpack for blender texture painting
Craft Reaper's illustrative brush pack for Blender texture painting. Product temporarily paused for payout unavailability in my region. Please see below for alternate brush shop.
Cant use soften brush in texture paint mode - Materials and Textures - Blender Artists Community
Texture Paint with Images - Stencil Brush (Tutorial) - BlenderNation