Is the OrthoPro surface file list order important for rectification?
Yes, the order of the surface files is critical for the rectification process. The following workflow puts the issue in context:
Use Project Planning to open an ImageStation project and select the photos to be ortho rectified.
Use the Elevation Data tab to first add all the structure and/or bridge individual triangulated DTM format surfaces…
Then add the ground surface(s) last. The order of the surfaces is critical for the rectification process. It is best practice the surfaces not be merged for top down processing as in the True Ortho workflow. See additional workflows in the help for True Ortho production.