Shading Techniques by smileymaste on DeviantArt

Adanced Shading Techniques by Snigom on DeviantArt

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Shading Tips by SadfaceRL on DeviantArt

Sphere (Stippling) by JunTheGreat on DeviantArt

Shading Techniques' by MatticusIV on DeviantArt

Exercise - Free user icons, exercise icon

Pencil Shading Techniques Intro RapidFireArt

Shading Techniques - Tips for Shading Your Drawings, shafing

Simple shading technique by looji on DeviantArt

face and shading practice by asocialconstruct on DeviantArt