Hard Edge of image / motion revleas boundary

[Harry S]

I have an image that I have applied an effect to. The problem is that the "bounding box" creates a hard edge and you can see it when the motion happens.

Is there any way to move the box edge over so that when the image moves into frame, you can't see the hard edge?

[Richard M Knight]

You could animate the mask path by clicking the stopwatch icon.

[Harry S]

Thanks for the reply. It's not a mask. Those are the natural boundaries of the element.

I think the conflict comes from using the TRANSFORM effect as changes scale differently to the MOTION effects.