artstation.com/learning
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ArtStation Learning is a subscription-based library of artist-focused video courses and guided learning paths. It covers perspective, composition, anatomy, color theory, lighting, and digital painting taught by industry professionals.
More resources on Perspective & Composition
Line of Action
Free perspective and gesture practice tool
Ctrl+Paint
Free video library on composition and perspective
Drawabox
Free structured lessons on perspective and boxes
Lesson 1: Lines, Ellipses, Boxes (Perspective)
Master perspective drawing! Learn the fundamentals: lines, ellipses, and boxes. Start your artistic journey with Uncomfortable's free Lesson 1.
gurneyjourney.blogspot.com
Gurney Journey is James Gurney’s art blog offering tutorials, process breakdowns, and essays on painting, perspective, and composition. Visitors will find step-by-step demos, color notes, sketch studies, and behind-the-scenes insights into illustration and visual storytelling.
conceptart.org
ConceptArt.org is a long-running artist community and forum focused on concept art and illustration, hosting galleries, portfolios, critiques, and tutorials. It covers perspective, composition, anatomy, and digital painting through discussions, step-by-step guides, and resource threads.