# Left Hand IK Always Active

## Reason - Mask curve is not added

### How to fix?

Add a <mark style="color:purple;">MaskLeftHandIK</mark> curve to your custom **AnimSequence:**

<figure><img src="https://3983499731-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FxsGuM7QMKoTm8rnHX3cO%2Fuploads%2FQ0nYzJ3HG5M3nXUMcCU9%2Fimage.png?alt=media&#x26;token=4ea36f99-b80d-47cd-a3c8-3dca4e935a88" alt="" width="356"><figcaption></figcaption></figure>

Then set the curve value to 1 - this will disable the left hand IK smoothly, based on the animation blending.