The purple/green areas have a MSI applied. The black area does not. The site design region boundaries are highlighted.
After applying the MSI's and building the surfaces, the program does not appear to be creating the subgrade correctly in some areas. It appears the program is transitioning the subgrade from the last line included in the surface to the FG of the adjacent area, intermittently, as shown below.
Surface slices through first example above.
Please advise as soon as possible as this issue has us pretty much dead in the water on creating sub-grades/takeoffs.
Project files: Transfer - Dropbox