MMMM....bumpy
Next click on the "Paint geometry" button and move the mouse into the 3D window and you should see a little green mound icon appear as you
move the mouse over each intersection of white lines
a left-click moves the ground upwards and a right-click moves it downwards
What I've done is right-click about a dozen times on the middle one then about ten times on the ones around it
and about five times on the ones around those to make a nice dip for my puddle/pool of water
be creative and add a few bumps upwards as well as dips
Now click on the little red X on the "Paint Geometry" window to close it and click the "Paint Alpha" tab...we're going to smooth those textures out.
With this displacement tool left-clicking the criss-crosses adds the secondary blended texture...in this case the grass
The more you click the more is added so I've added a bit around the edges of the dip on the higher ground
Compiling the map now shows a nice bumpy terrain with a good sized dip in the middle