How do I create a decal for water-trails like those in the tech-demo (a sphere rolls over the floor and leaves behind a trail of water)?
I already saw this youtube video (Water Dripping Shader & VFX in Unreal Engine 4 Tutorial - YouTube) and implemented some of it.
But I am now stuck with how to limit the opacity so that multiple overlaying decals dont add up.
Additionally I would like to remove (or soften) the normals of the underlying material, how could I do that?