In this unreal engine tutorial you will how how to make dissolve material with custom parameters.
- dont use noise for something like that, its extremely expensive, better use noise to bake out a texture, or use a nice noise texture.
- Remap the dissolve to 0-1 instead of -1.x to 1.x
Besides that, its a good tut.
i did not find remap working properly in unreal engine like it works in unity shader forge.
You can make new material functions and/or node setups yourself as well, as I am sure you know.
Take a look at What kind of Material Functions do you have/use? for a decent remap mat function.
Thanks for this link. really helpful.