I want to show something below the camera plane, let the users feel that they can see a "hole" in the current plane, I have already set the texture z position to minus, but still all the texture below is displayed, and also I just want to cut part of the current plane, and let the current plane hide the part of the edge of the hole below when users are not vertical to the plane. so what I need to do is let upper edge of the hole aligned with the camera plane. then cut out the camera plane exactly where the hole is located.
So you have some idea to achive this?
Thank you !