The information in this article applies to:
I have made a number of changes to the terrain in my plan, but the changes don't seem to apply. Why don't the changes that I made show in my plan?
In Chief Architect, you can add elevation data to a plan and then direct the program to generate contour lines and 3D terrain based on that data. The program does not generate these contour lines and terrain automatically, however, in order for changes that you make to the terrain to take effect, you must tell it to do so.
You can also specify that terrain be rebuilt whenever you create a 3D view by selecting 3D> 3D View Defaults from the menu and checking the box beside Auto Rebuild Terrain under the Options panel.