Graduated Feathering?

[Rik]

Is graduated feathering possible?

So that one side has none and the other side has more.

I've attached an image to give an idea as to what I am asking.

Now, please don't say "There, you've done it!"
That's 3 images put together to get the effect.
If you were doing more complex things, then it gets rather tricky. Well, for me at least.