Removing "steps" from Landscape CustomBrush Material

Hi!

I'm trying to use my own noise material as a Landscape CustomBrush Material. I'm new to this, but I finally got it in a way that kind of looks like a landscape.

https://imgur.com/a/1vqRuuL

The X and Y resolution looks pretty okay, but the Z resolution is very minecraft-like. I would like to make it smooth, but the smooth step function tends to make everything flat.

My blueprint is there as well as a few examples. If someone has a better alternative I'm all ears. Bonus points if you can tell me why the Material settings in the main window refuses to change any settings when I update it (last photo)

Thanks!!