I want to edit a terrain region in FSX, its a tabletop airport and I want to have slopes. Default airport is totally flat. I tried elevation and flattening but it makes it to look like a step, not a slanted slope.
Please explain more clearly what it is that you wish to achieve at the airport.https://www.fsdeveloper.com/forum/threads/how-to-edit-terrain.442551/post-796474
If you post a screenshot of the area in question, we can better advise you on what your options are.