1. An apparatus for creating a three-dimensional (3D) scene, comprising: an interface, being configured to receive a first image and a plurality of depth data of the first image; and a processing unit, being electrically connected to the interface and configured to generate a height map according to the depth data, wherein the height map and the first image have the same aspect ratio, wherein the processing unit is further configured to find a first region of the height map, the depth data within the first region change more greatly than the depth data outside the first region, wherein the processing unit is further configured to create a plurality of grids on a plane according to the first region and generate a 3D mesh by morphing the height map with the grids of the plane, a size of the plane is equivalent to a size of the height map, a second region within the plane corresponds to the first region of the height map, and the grids inside the second region has a finer resolution than the grids outside the second region, wherein the processing unit is further configured to generate the 3D scene by mapping the first image onto the 3D mesh.