He eventually returned to England for a "fashion shoot" offer with "Vogue". In 1966, The Beatles had just released "Rubber Soul" and Karl had the chance to meet up with their official photographer, Robert Freeman, who encouraged Ferris to experiment with different styles of images – which he promptly did – and created his unique psychedelic style. That summer on a trip to the Spanish island of Ibiza he discovered and began shooting the innovative psychedelic fashion work of designers Simon Posthuma and Marijke Koger – aka The Fool – and these photos were eventually printed in the fashion section of The Sunday Times. This was the first time such psychedelic photography and fashions had been seen anywhere. He and The Fool were then invited to come to London to shoot some more "Psychedelic" fashion features for other magazines, working from a shared studio in a former private dance theatre. There, they created "Art Happenings" with self played psychedelic music with Fashion shows, Freeform Dancing and Action painting, with Liquid Light and Photo slide projections superimposed on the performers by Karl Ferris who also shot music and fashion photos there. These Event parties became the talk of the Music and Art scene at the time and famous current Pop Stars and Artists would drop by and join in the action, "Drop In and Drop Out" was the common solgan used. Even the Beatles heard about the "Happenings" and came by and joined in. Also, Pink Floyd, Eric Clapton, The Cream, Donovan, T Rex, Mick Jagger, Grahman Nash, Graham Bond and artists Nigel Weymouth, Hapshas and the Coloured Coat, Peter Max and David Hockney dropped by. In 1967 Simon Posthuma and Marijke Koger with their colleges Josje Leger and Barry Finch aka "The Fool" were commissioned by The Beatles to paint their - "Apple Boutique" mural covering the entire building outside and in. Also they created a Psychedelic Fashion line that was to be sold inside the store, and Karl was there to photograph it all. and he was invited to do a stage "Liquid light show" for Pink Floyd, which is believed to be one of the first ever done in England. Ferris was introduced to singer/guitarist Jimi Hendrix in 1967 through musician/producer Chas Chandler, who had "discovered" Hendrix. Hendrix then asked Ferris to be his photographer and to re-shoot the cover for the UK version of his album "Are You Experienced" – which he was unhappy with – for the US market.