The new Fx node is pretty much the same as the Post Process Stack, but in node form. It is often a process of trial and error where am adjustment node would need to be replaced with another. Sometimes the node would need to be chained with another.
The Fx node makes that process easier by combining all the common adjustments inside a single node and allowing you to toggle them on and off. Additionally, it has its own Post Process Stack so you can apply further adjustments.
|Autolevel||Automatically levels the terrain where the heights are proportionately distributed between the highest and lowest points.|
|Equalize||Equalizes the terrain where the heights are linearly distributed between the highest and lowest.|
|Log||Applies logarithmic scaling that bulks up the terrain.|
|Invert||Inverts the terrain.|
|Abs||Abs node modifies the terrain by eliminating values that are either higher or lower than the value.|
|Blur||Applies Blur to the terrain.|
|Clamp||The terrain is proportionally reduced in height.|
|Clip||The terrain is clipped beyond the extents provided.|
|Raise||Raises the terrain by the specified amount.|
|Multiplier||Multiplier is the amount by which terrain is raised.|
|Shaper||Bulks up or bulks down the output.|