You don't have to call OnDrawGizmos() From anywhere, it is a editor function to display gizmos in the scene-view and is called automatically called!! 不能在任何地方调用 OnDrawGizmos()，这个函数是自动调用的。这个函数是编辑器函数，用来

问题 UnityException: Texture ‘img2’ is not readable, the texture memory can not be accessed from scripts. You can make the texture readable in the Texture Import Settings. 解决