# Avoid collisions and evaluate shots

As characters and objects move around in a complex Scene, obstacles in the Scene sometimes come between a camera and its target.  Similarly, you might need to move a camera to a position in the Scene that another GameObject already occupies. Cinemachine provides extensions to handle these situations:

* [Cinemachine Decollider](CinemachineDecollider.md)
* [Cinemachine Deoccluder](CinemachineDeoccluder.md)
* [Cinemachine Confiner 3D](CinemachineConfiner3D.md)
* [Cinemachine Confiner 2D](CinemachineConfiner2D.md)