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SHADING TIPs - this will make your DRAWINGs perfectly SMOOTH.
How to Transform PHOTOS into Pencil DRAWINGS in Photoshop - Image to Pencil Sketch in Photoshop
Pencil Drawing Techniques
Be BETTER on SHADING with Pencil! A Realistic Drawing Tutorial for Beginners
Secret Weapon for Pencil Drawing
Birch tree landscape drawing for beginners by pencil.
My art improvement through the months...
A pencil drawing of birch trees with winter landscape easy ways.