Photographer Pelle Cass creates surreal images of a frighteningly over-populated world A photographer has created a mind-bending study of people passing through locations through a stunningly unique series of photographs. Pelle Cass takes hundreds of pictures of public areas then uses composite techniques to include some of or all the people who have passed through. The result is a crazy over-populated world where people swarm across the landscape; sometimes pictured frozen in patterns with others and clones of themselves. Squirrel frenzy: A composite photograph of squirrels and pigeons in Boston Public Garden. Photographer Pelle Cass combines hundreds of exposures to create a unique take on the world Other highlights include dozens of dogs infesting a park, a duck pond overrun with multiple bird varieties and a snowy hill infested with sledges. The 58-year-old says his 'Selected People' series offers a view of a 'surprising world that is visible only with a camera'. Pelle, from Boston, Massachusetts, creates his composite photograph from approximately 300 exposures over an hour, with about 100 Photoshop layers. He explains: 'I want to get more life, more people, more time, more information, and more subjectivity into my photographs. These composite photographs examine a particular place over time, sifting through passersby for patterns and coincidences. I take hundreds of pictures fixed point, then I simply select (with the help of Photoshop) which figures to retain, and which to leave out. My one rule is that I leave each figure scrupulously unchanged, exactly in its original position. This makes the scenes feel real and also makes the pictures documents of a kind: these events really happened, unlikely as they seem. It's just that they didn't happen all at once. This process allows me to take objective facts-the faces and bodies of people on the street-and make something new and more subjective out of them, simply by sorting them. The result is a surprising world that is visible only with a camera. Park life: Photographer Pelle Cass mashes together hundreds of different shots to create mind bending collages showing hundreds of people in the same location, in this case Boston Common Thronging: It appears to be a very busy morning at this crossing opposite Boston's Faneuiel Hall thanks to a bit of Photoshop trickery Dog day afternoon: It's a canine take-over in Brookline's Armory park with dozens of dogs running amok Playground crush: Photographer Pelle Cass, from Boston, Massachusetts, takes approximately 300 exposures over an hour to create his collages Eye on the ball: A game of football in Brookline's Cypress Park is transformed into a crazy scene Multiplied: The same players appear to pop up over and over again in this shot of Cypress Field in Brookline 'Selected People': Pelle Cass takes hundreds of pictures of public areas then uses composite techniques to include all the people who have passed through Chockablock: Frog Pond on Boston Common appears ram packed in another of Pelle Cass's brilliant shots Shopping spree: The 58-year-old photographer says his 'Selected People' series offers a view of a 'surprising world that is visible only with a camera' 'More life': Photographer Pelle Cass uses around 100 different layers within Photoshop to create the crazy effect Swarming: People trudge along a walkway in Esplande, Boston in another of photographer Pelle Cass's composite images Walk this way: Rose Kennedy Greenway in Boston is crammed thanks to a bit of computer wizardry Rush hour: The ice rink in Boston Public Garden's frog pond is looking more popular than ever in another of photographer Pelle Cass's brilliant collages Flower power: A tulip bed in Boston Public garden creates a great focal point in this mind-boggling collage Pelle' Crass's 'Selected People' series creates an over-populated world where people swarm across the landscape; sometimes pictured frozen in patterns with others and clones of themselves A procession of people taking a stroll in Boston Public Garden on a fine summers day Trick shots: Members of the public taking pictures and looking at their mobile phones creates a weird and wonderful image Snow storm: Dozens of children enjoy a day sledging in Brookline's Larz Anderson Park Technique: Mr Cass does not always cram as many people as possible into his shots. In some images, such as this view from the Boston's Prudential Center footbridge, it's all about the positioning Town hall madness: Dozens of people appear to swarm around the Government Center Plaza in Boston in this brilliant image Quincy Market in Boston provides the scene for another in the 'Selected People' series of composite photographs By Pelle Cass A pathway in Boston Public Garden is thronging with life in this composite photograph It may look like a rodent armageddon in Boston Public Garden, but there are only a couple of squirrels here photographed multiple times This picture of Boston Public garden could pass for a normal everyday scene, except that it is made from approximately 300 exposures over an hour, with about 150 photoshop layers Bubble masters: Bethesda Fountain in New York City's Central Park in another of Pelle Cass's composite images Flocking together: Dozens of birds appear to congregate in Boston Public Garden Walk of life: People stroll on by Boston Public Library in one of photographer Pelle Cass's collages Self Portrait: Photographer Pelle Cass is pictured in Boston Public Garden, the setting for many of his 'Selected People' composite photographs