New Unity Sprite Mask alpha support

Does new Unity 2017.1.0f3 support alpha masking with soft edges? I’ve tried to create a mask of a sprite with soft transparent gradient but it seems not working as I needed. Sprite Mask only creates basic shape, I’ve attached the screenshot of the sprite I used to create a mask and the result that I got. So is there any way to create soft edges with standard Unity masking instruments?
Thanks for any tips!!

If your build target is PC or WebGL, you can use SoftMask from this:

But it doesn’t work with mobile :frowning: