Soft shadows and increasing smoothing angles does not help, I already tried this. The meshes in the image above all are smoothed with an angle of 60 (default). Additionally I did not see any difference between smoothing angles of 60 and 90. What does help a little bit is increasing mesh resolution (as with terrains). However just one step of subdivision only will blow up mesh size by a factor of 4 - and will not remove those artefacts to a level they are no longer visisble. More subdivision will cause Vue to crash (the well known and still unresolved memory bug with imported meshes ...) The only thing I found up to now that does the job is changeing the direction of light. If light is coming from the front, there are no artefacts, but no shadows and no contrast too. The result is a boring image, not exactly what I try to achieve.