But I just kept working away at it and eventually it came together. I used a couple of different techniques to soften the gray/white edges, all centered around darkening the white and lightening the gray.
The there was quite a bit of work to bring out the cat. I added a bit more collage - all small bits - and in the end I think it works well.
I call this one "The Night of Magic." I had the vision of adding all the swirls around the antlers from the beginning, but it took a bit of work to get to the place where I could add them.