The development of OP-CV was the result of many years of research, practical experimentation, and careful refinement by author Paul Hollingsworth. Every topic included in the book was thoughtfully considered, with the materials, equipment, and techniques rigorously tested and evaluated before publication.

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Since the completion of OP-CV, Paul has continued to explore the possibilities of oil painting, pushing the boundaries of traditional practice through ongoing experimentation with new materials, methods, and artistic approaches. This continued research has generated valuable insights, fresh perspectives, and new information that extends beyond the scope of the original publication.

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To share these developments, OP-CV Extra has been created as a companion resource, providing readers with the latest discoveries, expanded discussions, and additional content that has emerged since the release of OP-CV. As research continues and new ideas evolve, this section will be regularly updated, ensuring it remains a dynamic and relevant extension of the book.

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We hope you enjoy exploring this continually evolving resource and keeping up to date with the latest thoughts, research, and contributions from Paul Hollingsworth,  Bryony Knight, and guest contributor Gaenor Farren-Smith.