I am editing a route in trainz22 and I am seeking help for removing hills from certain areas along the route. Can anyone point me in the right direction?
There are two immediate possibilities that come to mind, depending on how "severe" you want the removal to be.
Your post does not mention if you are using Surveyor Classic, as in TRS22 standard, or Surveyor 2.0, which is an option in TRS22PE.
Severe solution: Quick and simple
Surveyor 2.0 - Set the Brush Tool target to Ground Height and its action to Set Height. Set a height value and a brush radius in the Tools Option Palette and paint the mountains away.
Surveyor Classic - Open the F1 Topology Tool, set a height that will "flatten" the mountains and turn the Set Height control on. Set a suitable Radius and paint the mountains away.
Gentler solution: This takes longer and requires more effort but will probably give a better result
Surveyor Classic - it has been too long for me to remember but you could adapt the above approach using the far more limited options available in Classic.