Answer:
In RFEM, the graphical results are smoothed on the basis of the results at the FE mesh points. The results are transferred to REVIT on the basis of the results on the grid points. In RFEM, the grid for the surfaces is set to 0.5 m by default. In this case, set a fine grid for the surfaces, and the graphical display of the results in RFEM and REVIT is comparable.