private int[] FlipTriangles(int[] triangles) {
			int[] trianglesCopy = new int[triangles.Length];
			Array.Copy(triangles, trianglesCopy, triangles.Length);

			for (int i = 0; i < trianglesCopy.Length; i += 3) {
				trianglesCopy[i] = triangles[i + 2];
				trianglesCopy[i + 2] = triangles[i];
			}

			return trianglesCopy;
		}