I am looking at turorials online and videos about Cinemachine Confiner and they all have a “Confine Screen Edge” option but it doesn’t seem to be the case for me.
The current version I am using is Unity 2017.4.30f1 and that is because I am using a plug-in that doesn’t work on anything after Unity 2017.
Confine screen edges is available only when the main camera is orthographic, not perspective.
Thank you!
FYI: CM 2.7 has a new extension: CinemachineConfiner2D that will confine screen edges for perspective and orthographic cameras.
how to get the chinemachin confiner ?
i used chinemachin 2.6 , itype confiner but there is no script
It might be four years later, but this just saved me a huge headache!
@Gregoryl But now I’ve lost the ability to use 3D Box Colliders to confine my orthographic camera 
If I use a CinemachineConfiner2D, I’m forced to use a 2D Box collider, and if I use a CinemachineConfiner3D, I can continue to use my calculated Box Colliders, but only the center/position of the camera is getting bound, not the whole frame:
I would rewrite my code to convert all my 3d box colliders to their corresponding 2d shape that would bound the same world area, but my camera is at a 45 degrees pointing down, and I can’t rotate Box Collider 2Ds. Further, the Cinemachine docs state that:
This works for orthographic or perspective cameras, provided that the camera's forward vector remains parallel to the bounding shape’s normal (that is, that the camera is looking straight at the polygon, and not obliquely at it).
What are my options? Continue to use the old Confiner?
Yes, you can continue to use the old confiner.
Thanks for bringing up this issue. We will try to think of ways to support this use-case properly with CM3.
The latest version currently does not support this use case, which is very common and is a requirement for most 3D casual games
In fact the CM3 confiner 2D does support oblique cameras, but the caveat is that the confining will not always be precisely at the edge of the bounding shape. You will need to adjust the confiner bounds to accommodate this.
Is this resolved now in CM3?