1. A method for stitching a boundary transition region of a patch, the method comprising: computing a first number of vertices for an inside edge of the boundary transition region using a first tessellation level of detail (LOD) of the inside edge, wherein the first number of vertices is computed as two less than an integer portion of half of the first tessellation LOD; computing a second number of vertices for an outside edge of the boundary transition region using a second tessellation LOD of the outside edge, wherein the second number of vertices is computed as an integer portion of half of the second tessellation LOD; merging two vertices of one of the first number of vertices and the second number of vertices based on the first tessellation LOD and the second tessellation LOD to remove at least one triangle from the boundary transition region and produce a set of vertices for the boundary transition region; and stitching, using at least one processor, the set of vertices to produce an ordered list representing a graphics primitive topology for the boundary transition region of the patch.