The only thing I can think of would be to lay a section of track every so often, set it to whatever grade you want, use the "smooth Spline" tool, and then remove the tracks.
I've sloped an area of 20 baseboards using this method to give a 1% slope (ie 20x1). It doesn't take that long. Use double track and leaving the end of one track fixed in a corner move the other end 2 squares, level, another 2 squares, level etc etc. Then, when you get to the other corner repeat for the other end.
I do note that Surveyor left a 'hole' in the middle of about 5 baseboards (where it simply had refused to lift the ground to the rail) which I then had to fix. :hehe:
If you want to use the "track" method you"re better off using a Motorway which will actually raise two grid squares at a time.Its best to click Smooth Spline several times to fully raise the Terrain.
Try using the copy tool on terrain that has the slope you want. Then paste using the relative setting and overlapping the bottom of the paste to the top of the existing slope. It works for me.
Use Topology (F1), Advanced Functions. Select Slope, Select area, click on fill, To change the slope, adjust the Threshold Knob. You can do several sections at once and is much faster than methods described above.
Use Topology (F1), Advanced Functions. Select Slope, Select area, click on fill, To change the slope, adjust the Threshold Knob. You can do several sections at once and is much faster than methods described above.
To get around that limitation, I first lay down a stretch of track that goes the uphill length of the slope. Then I give that track the gradient that I want. Then I use the Topology Slope function to get the terrain to match the slope of the track. You will not be able to get every slope exact, but the what terrain in nature is?