The invention is a method for generating a three-dimensional model, said method comprising generating (S100), by means of a scanning device, a point set corresponding to a scene comprising at least one object shape, dividing (S120) the point set 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 corresponding to the scene, and a background point set corresponding to a background of the scene, separating (S130) from the foreground point set, at least one object shape subset corresponding to each of the at least one object shape, respectively, generating (S140) a background three-dimensional model on the basis of the background point set, generating (S150) from optical recordings a three-dimensional model of at least one substituting object shape assignable to each of the at least one object shape, respectively, and generating (S160) a combined three-dimensional model on the basis of the background three-dimensional model and the three- dimensional model of at least one substituting object shape substituting each of the at least one object shape subset, respectively. Furthermore, the invention is a system for generating a three-dimensional model
