1. A method for generating a three-dimensional model, said method comprising generating (S 100 ), by means of a scanning device, a point set ( 47 , 99 , 101 , 111 ) corresponding to a scene comprising at least one object shape, and dividing (S 120 ) the point set ( 47 , 99 , 101 , 111 ) corresponding to the scene into a foreground point set corresponding to a foreground of the scene, and comprising a subset corresponding to the at least one object shape of the point set ( 47 , 99 , 101 , 111 ) corresponding to the scene, and a background point set ( 48 ) corresponding to a background of the scene, characterised in that separating (S 130 ) from the foreground point set, at least one object shape subset ( 10 , 20 , 22 , 24 , 26 , 40 , 40 ′, 42 , 42 ′, 44 , 44 ′, 46 , 46 ′, 68 , 76 , 100 a - c , 118 a - c ) corresponding to each of the at least one object shape, respectively, generating (S 140 ) a background three-dimensional model ( 56 ) on the basis of the background point set ( 48 ), generating (S 150 ) from optical recordings a three-dimensional model ( 92 , 94 , 96 , 98 ) of at least one substituting object shape assignable to each of the at least one object shape, respectively, and generating (S 160 ) a combined three-dimensional model on the basis of the background three-dimensional model ( 56 ) and the three-dimensional model ( 92 , 94 , 96 , 98 ) of at least one substituting object shape substituting each of the at least one object shape subset ( 10 , 20 , 22 , 24 , 26 , 40 , 40 ′, 42 , 42 ′, 44 , 44 ′, 46 , 46 ′, 68 , 76 , 100 a - 100 c , 118 a - 118 c ), respectively.