I see now, sorry for the confusion.
It sounds like the spot the fade gets strong is too far down the image for you. Try tweaking that so that its goes to 20% or so and that will bring the fade way up the image. I moved it down because I wanted the fade to be pronounced in the side images but not as much in the front facing image.
There are also parameters that you can tweak in the code that allow you to change the size of the images relative to the overall size of the layer that they are displayed in. That is another place where you could tweak and perhaps get more of what you are looking for.
Good luck and please let me know if any of this does not make sense.