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 (921, 925, 927, 929) are added to the first fragment, the ghost cells (921, 925, 927, 929) 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 (921, 925, 927, 929) 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 (921, 925, 927, 929). 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 (921, 925, 927, 929) are added to the first fragment, the ghost cells (921, 925, 927, 929) 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 (921, 925, 927, 929) 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 (921, 925, 927, 929). ghost cells (921, 925, 927, 929) are added to the first fragment, the ghost cells (921, 925, 927, 929) 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 (921, 925, 927, 929) 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 (921, 925, 927, 929).