How to dissolve from point of impact

I have a dissolving shader that works fine but I’d like to push it some more. Currently it dissolves from top-to-bottom, but I’d like it to dissolve from the point of impact if possible. I’m not too familiar with shaders/materials and blueprinting (I followed a guide for the dissolve fairly strictly), and so I’m not sure where to go for this kind of effect I’m looking for.

69835-disintegrate.gif

This is what I’ve achieved so far. As you can see, it dissolves from what seems to be the top of the U 1 to 0, and not where the projectile (invisible in the .gif) hits. If someone could help me find a solution, that’d be fantastic.

Here’s my shading network.

Have you got a solution?

Maybe use a center-out gradient instead of the one in the tutorial, so that the center is where the impact was? I have the same problem, and this is just a guess, but maybe?