代码分割精灵，能不能多边形分割？？

[rock_333]

以下代码能动态分割精灵，只能分割成矩形，不知道能不能分割成多边形？
SpriteRenderer spriteRenderer = spriteToCrop.GetComponent<SpriteRenderer>();
Sprite spriteToCropSprite = spriteRenderer.sprite;
Texture2D spriteTexture = spriteToCropSprite.texture;
for(int i = 0; i < 8; i++)
{
for(int j = 0; j < 8; j++)
{
Sprite newSprite = Sprite.Create(spriteTexture, new Rect(i * 64, j * 64, 64, 64), new Vector2(0.5f, 0.5f));
GameObject n = new GameObject();
SpriteRenderer sr = n.AddComponent<SpriteRenderer>();
sr.sprite = newSprite;
n.transform.position = new Vector3(i*2, j*2 , 0);
n.transform.parent = spriteToCrop.transform;
}

[rock_333]

做以上游戏就要用到动态分割多边形精灵图片。请高手指教！