Abstract: A method and apparatus that receives a coded video bitstream from an encoder; retrieves, from the coded video bitstream, a mesh including a plurality of polygons that describe one or more surfaces of a volumetric object; predicts a current value of an index of the UV-to-XYZ index array from at least one previously coded value included in another index in the UV-to-XYZ index array, wherein the UV-to-XYZ index array includes a plurality of indices which correspond each two-dimensional (2D) UV vertex associated with the mesh to a three-dimensional (3D) XYZ vertex associated with the mesh; derives a prediction residual associated with the current value of the index of the UV-to-XYZ index array; and reconstructs a boundary UV coordinate based on the predicted current value of the index of the UV-to-XYZ index array and the derived prediction residual.