panning layer blur cut off.

Hi, I have a long panning layer in a shot .
I need to blur that layer so I need to convert to bitmap. But then the animated layer is cutoff. How do I create the layer so that the full drawing outside the camera is converted and blurred.
I also need to export the wide pan level for the edit dept . How can I do that . ?
Many thanks for anyone who can help .

Perhaps your bitmap resolution is limited?
Go into menu-Storyboard-Properties…
Check the “Bitmap Resolution” tab and increase
the size of the “default canvas” if your BG exceeds
the limit.