Leverage the Parallel Planes feature in Dot3D 5.1 & up to improve the accuracy of scenes with flat, level surfaces. This Planarity Constraint feature can be utilized on the same plane (i.e. the tagging same large floor plane across different areas of a scan) or on multiple planes that are parallel to each other (i.e. the top and bottom landings of a staircase).

To use this feature, tap and hold on the photo icon during scanning and then, without releasing your hold, move to the plane icon. Then, still without releasing your hold, point the crosshair at the flat plane you want to recognize. Repeat as needed on the same plane or another parallel plane.

So long as you recognize the same (or parallel) plane multiple times, these flags will then automatically be applied during optimization for additional accuracy improvement (on top of all the usual optimization constraints: loop closure, AprilTag targets, auto-alignment, etc).

Just remember, this feature should only be used for planes that you actually trust as being totally flat/parallel (i.e. indoor/building scans).