A computer implemented Method of processing a geometry image, the geometry image being generated from a mesh associated with a 3D scene, the geometry image comprising a first chart and at least a second chart (11, 12, 13, 14), each first and second chart representing a part of the 3D scene, characterized in that the method comprises, for at least one current pixel of the first chart different from pixels (211 to 217) of the first chart forming border of the first chart: - computing a reference direction from mesh coordinates associated with a first pixel, the first pixel corresponding to a pixel of the border of the first chart crossed by a determined direction having as origin said at least one current pixel, said at least one current pixel forming an origin of said reference direction, - comparing the reference direction with a set of candidate directions (22, 23, 24, 25, 26), each candidate direction being computed from the mesh coordinates associated with the at least one current pixel and indirection mesh coordinates associated with one pixel (222 to 226; 212 to 214) of the neighbourhood of the first pixel, the indirection mesh coordinates corresponding to mesh coordinates of a second pixel of the border of said at least a second chart pixel corresponding to said pixel of the neighbourhood of the first pixel, the second pixel being the pixel for which the difference between its mesh coordinates and the mesh coordinates of said pixel of the neighbourhood of the first pixel is minimal, the neighbourhood of the first pixel comprising pixels of an outer border of said first chart and pixels of the border of the first chart, the outer border comprising pixels located outside from said first chart and adjacent to pixels forming the border of the first chart, - selecting a pixel of the border of the at least a second chart (11, 12, 13, 14) according to the comparison result, the selected pixel corresponding to the pixel for which the difference between the reference direction and the candidate direction associated with said selected pixel is minimal with regard to the differences between the reference direction and the other candidate directions (22 to 26); - determining a scanning direction for scanning the at least a second chart corresponding to said determined direction, said scanning direction being determined according to the determined direction, a tangent to the border of the first chart at said first pixel and a tangent to the border of the at least a second chart at the selected pixel. - computing a reference direction from mesh coordinates associated with a first pixel, the first pixel corresponding to a pixel of the border of the first chart crossed by a determined direction having as origin said at least one current pixel, said at least one current pixel forming an origin of said reference direction, - comparing the reference direction with a set of candidate directions (22, 23, 24, 25, 26), each candidate direction being computed from the mesh coordinates associated with the at least one current pixel and indirection mesh coordinates associated with one pixel (222 to 226; 212 to 214) of the neighbourhood of the first pixel, the indirection mesh coordinates corresponding to mesh coordinates of a second pixel of the border of said at least a second chart pixel corresponding to said pixel of the neighbourhood of the first pixel, the second pixel being the pixel for which the difference between its mesh coordinates and the mesh coordinates of said pixel of the neighbourhood of the first pixel is minimal, the neighbourhood of the first pixel comprising pixels of an outer border of said first chart and pixels of the border of the first chart, the outer border comprising pixels located outside from said first chart and adjacent to pixels forming the border of the first chart, - selecting a pixel of the border of the at least a second chart (11, 12, 13, 14) according to the comparison result, the selected pixel corresponding to the pixel for which the difference between the reference direction and the candidate direction associated with said selected pixel is minimal with regard to the differences between the reference direction and the other candidate directions (22 to 26); - determining a scanning direction for scanning the at least a second chart corresponding to said determined direction, said scanning direction being determined according to the determined direction, a tangent to the border of the first chart at said first pixel and a tangent to the border of the at least a second chart at the selected pixel.