1. A method for texture image compression in a three-dimensional (3D) video coding system, the method comprising: encoding or decoding a depth map; deriving depth information related to the depth map; and encoding or decoding a texture image based on the depth information derived, wherein a processing order relating to an encoding order or a decoding order for the depth map and the texture image is based picture-wise interleaving, wherein the texture image is partitioned into texture blocks, wherein motion information of a texture block of the texture image is derived from motion information of a corresponding texture block in another view or a corresponding depth block of the depth map, and wherein a location of the corresponding texture block is derived based on the depth map, wherein information for the processing order is indicated in a bitstream associated with the texture image, wherein said encoding or decoding the texture image comprises determining a mode for a current region of the texture image based on a mode of a corresponding region of a corresponding texture image in another view.