Cinemachine 2D Camera Deadzone Height Limitation

Hmmm... you seem to have indeed tripped over a limitation. The soft zone can stretch to 2, but the dead zone can only stretch to 1. There is no good reason for that, so we will fix it for the next CM release. Thanks for letting us know!

In the meantime, there are a couple of ways to implement a workaround:

1. You can set the screen Y to 0.5, and then the dead zone height of 1 will be enough to fill the screen. You will just need to start your camera off on the ground - then the dead zone will take care of keeping the camera from moving vertically.
2. You can add a custom extension to manage the vcam's Y position. Here is one that locks it to a specific value. You can modify it to handle the camera Y any way you like.
   
   Code (CSharp):

   1. using UnityEngine;
   2. using Cinemachine;
   3.  
   4. /// <summary>
   5. /// An add-on module for Cinemachine Virtual Camera that locks the camera's Y co-ordinate
   6. /// </summary>
   7. [SaveDuringPlay] [AddComponentMenu("")] // Hide in menu
   8. public class LockCameraY : CinemachineExtension
   9. {
   10.     [Tooltip("Lock the camera's Y position to this value")]
   11.     public float m_YPosition = 10;
   12.  
   13.     protected override void PostPipelineStageCallback(
   14.         CinemachineVirtualCameraBase vcam,
   15.         CinemachineCore.Stage stage, ref CameraState state, float deltaTime)
   16.     {
   17.         if (stage == CinemachineCore.Stage.Body)
   18.         {
   19.             var pos = state.RawPosition;
   20.             pos.y = m_YPosition;
   21.             state.RawPosition = pos;
   22.         }
   23.     }
   24. }
   25.  

 

If you want the camera to remain 100% static, then don't follow the player.
If you want the Y position of the camera to remain static, but track the player's X position, then you can attach the script from the post above.