best way to Flatten rivers?

[Spudknocker]

Hey CA!  Anyone have any tips about how to flatten rivers that go through mountain ranges? 

[+Sundowner]

Cat D8...

[Nightshade/PR]

2 Megatons oughta do it quite nicely, and rather quickly.

[+Gepard]

export the heightmap via TerrainEditor.

Edit the heightmap with paint program.

import the hightmap in TerrainEditor.

save all

 

and pray.

Edited November 29, 2016 by Gepard

[Wrench]

what Gepard said

 

also, 

 

TFD tool.

 

I used it to cut a river canyon through some mountains on the (unfinished) CBI map. But one must be VERY careful, or you'll have a valley where you don't want it

[Spudknocker]

Ya I have been using the TFD tool and I have found a way to make the rivers... However now i have the problem of airfields not becoming completely flat... tires are still poking through the tarmac... airplanes take off fine its just an annoying visual thing

 

So i tried exporting a heightmap BMP file from the TFD tool and then reconverting it back to an HFD using the BMP2HFD tool to see if a completely new file would solve the runway issue but now it just hangs up at 30% loading... thank gosh I backed up the original HFD

 

Anyway around the game not accepting an HFD from the BMP2HFD tool?