Terrain modification in Gaia Spawners

[Sorra the Orc]

I've been working on my Tropical terrain biome and was wondering if there was a way to automatically smooth the beaches. I knew I could do it in the stamper when creating the world using Smooth, but since I'm trying to make this biome reusable by others I wondered if there was a way I could do it automatically. 

To my delight I discovered that I could, here's my before (there's a max size per post, after and my spawner settings will follow in a reply):

Edited December 27, 2021 by Sorra the Orc

[Sorra the Orc]

And after: 

[Sorra the Orc]

Here's the settings I used:

The Mask Curve is important so here's a better view:

[Sorra the Orc]

I may crank up the intensity of the smoothness applied, I'll try it out on a few maps first.