Dissolve Moving Effect

Hi guys. Tell me how to achieve this effect?

Looks like it uses simple masked material with soft sphere mask. it uses player character location as sphere center and some additional texture, maybe some kind of noise.

Search for dissolve materials tutorials [Tutorial]Dissolve Material - Community Content, Tools and Tutorials - Unreal Engine Forums.

Yes, I am using Sphere mask. But I dont understand how make same dissolve border around mask radius.

Sorry, my fails) I dont saw what my hardness was high. Past hardness 0? and use I can use noise on border. Thx.

Here is example setup.

link text