Raise/lower whole sections of terrain with a smooth transition. Great for large river systems or table-mountains

This script will force all cyan-annotated blocks to a specified level and smoothly transition the change into the existing terrain.
Transition radius can be configured.

I used it to paint a river system with annotation and then force it to level 62 to create ocean-level rivers, and i used it to mark out a continent and raise that out of the water with one click.

https://github.com/IR0NSIGHT/ExpandLayer/blob/master/src/ValleyCraft.js