How we can assign different colors to isopach surface and save the color file like in Inroads SS2.
I am not sure this is available in OpenRoads Designer anymore, but maybe you can try with Display Style to one of the Thematic Styles (Height or Slope).
It is strange that OpenRoads 2021 cannot create a list or graphically represent texts that indicate the difference in level between 2 terrains. With the height visualization style it is not practical to calculate these differences in level, on site it is needed very frequently. Is there any progress?