Simple Terrain Tutorial

Click this GameObject to edit terrain,just like unity terrain,almost everything is same

Elevation

click Elevation,then input opacity to 0.1~0.2

everything including on Instruction

Set/Sample Height

everything including on Instruction

input the height u need in y field,

set opacity to 0.2~0.4

then fit the terrain

Splat

everything including on Instruction

set opacity to 0.3~0.5

toggle Multi Selection for mix textures

Completed

that's all what about edit terrain,I only used this 3 functions to create the terrain in the screenshot