I am trying to figure out why a created surface has changed when I add -23m value at the vertical datum, difference with Geoid option in the output coordinates selection. When I process the images with value 0m, the point cloud is accurate (I know that because I compare with actual RTK data). When I process the images with the exact same settings but with -23m value in the vertical datum of the output coordinates option, I get a difference with the RTK measurements. I am comparing volumes with a base RTK surfaces - one in ellipsoid heights (0m value) and Geodetic height (-23m value). I thought that adding a value there would just “lift” the point cloud with 23m without changing it.