A computer-enabled method for rendering a first fragment of a reconstructed object , the reconstructed object comprising a plurality of fragments, wherein the reconstructed object is for animating an object to be fractured into the plurality of fragments, the method comprising: evaluating at least one characteristic of a surface representation of the first fragment using surface characteristic data associated with a second fragment of the plurality of fragments, the second fragment being adjacent to the first fragment ; and causing a display of a surface representation of the first fragment using the evaluated at least one characteristic, characterized in that : ghost cells are added to the first fragment , the ghost cells comprising a plurality of surface tiles around a boundary of the first fragment that provide surface characteristic data of a plurality of surface tiles of the second fragment ; the ghost cells are not displayed when the surface representation of the first fragment is displayed; and the evaluating of the at least one characteristic of the surface representation of the first fragment includes smoothing the surface representation by averaging surface characteristic data associated with a plurality of surface tiles of the first fragment with the surface characteristic data of the plurality of surface tiles of the second fragment provided by the ghost cells . evaluating at least one characteristic of a surface representation of the first fragment using surface characteristic data associated with a second fragment of the plurality of fragments, the second fragment being adjacent to the first fragment ; and causing a display of a surface representation of the first fragment using the evaluated at least one characteristic, characterized in that : ghost cells are added to the first fragment , the ghost cells comprising a plurality of surface tiles around a boundary of the first fragment that provide surface characteristic data of a plurality of surface tiles of the second fragment ; the ghost cells are not displayed when the surface representation of the first fragment is displayed; and the evaluating of the at least one characteristic of the surface representation of the first fragment includes smoothing the surface representation by averaging surface characteristic data associated with a plurality of surface tiles of the first fragment with the surface characteristic data of the plurality of surface tiles of the second fragment provided by the ghost cells . ghost cells are added to the first fragment , the ghost cells comprising a plurality of surface tiles around a boundary of the first fragment that provide surface characteristic data of a plurality of surface tiles of the second fragment ; the ghost cells are not displayed when the surface representation of the first fragment is displayed; and the evaluating of the at least one characteristic of the surface representation of the first fragment includes smoothing the surface representation by averaging surface characteristic data associated with a plurality of surface tiles of the first fragment with the surface characteristic data of the plurality of surface tiles of the second fragment provided by the ghost cells . <EOS>