Getting the ground to shape just how you want it can be hit and miss with the smoothing tool.
When your making something like Stunt Park, and you need to the curves to be flawless, you can do it by moving individual points.
- Go into the 'Terrain Mapper' Mode
- Point Manipulation Tool ( red sphere with rods coming out )
This makes your map have lots of dots all over the surface.
- Toggle Point Auto Smoothing OFF ( right of previous button )
This is stops surround points being selected yellow
- Press SpaceBar to clear any selected points
You will need to do this before selecting each indivual point
- Click on the point you wish to raise or lower
It should turn red
- Hold shift, click and mouse the mouse up and down
And you should see the terrain point raise and lower
- Repeat for other points
With this you can make points perfectly straight by watching the lines, or by selecting points at either end, you can raise and lower them together to create an even curve.