Blend Hard Edge of a portion of a mask & smart filter to underlying layer?
Hi all,
I have an image I took in Oahu, I was focusing on capturing the sun setting. In this image I want to smooth the water from the horizon line just before the waves start to break over the swimmers and the shore.
Before Image

I managed to achieve the effect I want, however I have a hard edge.

I created a smart object layer, made a selection & mask and used the motion blur filter

How do I get rid of the hard edge so that it looks more natural?
Thanks
