You can add new fixed cameras by dropping the prefab FixedCamera in your scene (or instantiating it from the Palette Tool). The prefab contains a VirtualCamera and a Trigger. Once the player enters the trigger the camera will be activate.
Make sure you cover the desired area with the trigger. In this example, we want the camera to activate when the player enters the corridos so we make the trigger to cover that particular area.
https://lh4.googleusercontent.com/J-Gkv3oODSrvgMcF3-RPxgHtxX3Wxy33ac3MtEKf51EjcGxF9yIBDKYqlg9wGeb01wmtbV2d3kRAMnvf-OdHRGbf8cj1kz4nvrwTGOr_Q-t_vEjl9nE0oHtxls0HsCi0eRRx89tD_DGKtU0ZT04AXahnPyqowTYDsU_ls4juD2krN2TP69xYrcF3
You can use other shapes for the trigger by replacing the BoxCollider with other colliders as long as they are marked as a trigger.
Once the area has been covered you have to position your object POVVirtualCamera in the right angle. We have create a component called CameraPreview attached to the POVvirtualCamera object that will allow you to preview the camera. Remember that you can change the CinemachineVirtualCamera parameters, such as FOV to get the desired camera view.
https://lh4.googleusercontent.com/aHxkuqIMfGun_as4j8V68unA0E2WEX7GRXItaHzxspWgADfNQLNcR-4-3QJ_IP0mR_iruy9ERSBOGeJuVvl6B0Cu3Dz_HCVs3_XdKy-Vwy7y7uWkuUdICIzjgKsrABF_EriAa3XL_3EmFi1J3l3KkUXlLv5edU3Fmz4h5Jd8fyOUs4FEmYwWjjpI
The component CameraPreview contains since 2.4 two utility buttons that will help you setting up these camera angles.
Go To POV: Will move the editor camer to the VirtualCamera position and rotation.
Move to viewport POV: Will move the POV to the current editor position and rotation.
If a box trigger is not enough for your area layour, there is also the prefab FixedCameraWithShape, which contains a customizable shape which will be used to generate the trigger collider.
This shape can be adjusted to create complex convex triggers.
If a concave trigger is needed, the Trigger object inside a FixedCamera can be duplicated to create a compound collider. It is important that these new object stays at the same level in the hierarchy as the original Trigger.
