How to use Smooth function?

Development World Creation
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1

I use sculpt to produce a river basin. I want to use Smooth to smooth it out but it just seems to fill back in the landscape I removed with Sculpt. What am I doing wrong?

Thanks

2

Hey there @cwjj67! Welcome to the community! Smooth will often bias to be a bit additive, try to smooth with a smaller radius (less verbosity in the highs and lows) and lower the intensity and it should feel a bit better.