I need help with landscape painting.

I’m going to draw the topography of the golf course using the landscape function. I’m trying to draw the bunker topography like the picture below, but if I paint the texture with a paint tool, the curve doesn’t live and it’s painted angled like a staircase.


If I use the Smooth function, the range or shape I want will be ruined. The landscape blend mode is currently set to -LB Height Blend.
Is there a way to set the value in blue print or express the curve properly in relation to the landscape paint? I need your help.