https://www.fastcodesign.com/3039090/how-a-forgetful-mind-can-be-a-more-creative-mind image from website noted above

My work, useful links and ideas about creating art
https://www.fastcodesign.com/3039090/how-a-forgetful-mind-can-be-a-more-creative-mind image from website noted above
Some interesting points made in this blog: http://blog.oilpaintersofamerica.com/2012/08/paint-from-life-or-photos/
http://www.artiscreation.com/red.html#PR264 image above from the extremely useful Dick Blick website to which this pigment database links.