Neo-progressive bands tended to use Peter Gabriel-era Genesis as their "principal model". They were also influenced by funk, hard rock and punk rock. The genre's most successful band, Marillion, suffered particularly from accusations of similarity to Genesis, although they used a different vocal style, incorporated more hard rock elements, and were very influenced by bands including Camel and Pink Floyd. Authors Paul Hegarty and Martin Halliwell have pointed out that the neo-progressive bands were not so much plagiarising progressive rock as they were creating a new style from progressive rock elements, just as the bands of a decade before had created a new style from jazz and classical elements. Author Edward Macan counters by pointing out that these bands were at least partially motivated by a nostalgic desire to preserve a past style rather than a drive to innovate.