 For Urban it was a case of hubris because now he could no longer exercise control over his own system, so it became worthless.For Friese-Greene, the arrival of the war and personal poverty meant there was nothing more to be done with colour for some years.His son Claude Friese-Greene continued to develop the system with his father, after whose death in the early 1920s he called it "The Friese-Greene Natural Colour Process" and shot with it the documentary films "The Open Road", which offer a rare portrait of 1920s Britain in colour.