I was wondering if it would be possible to add a streamlines filter to surfaces in the post processor. This would be super helpful because we could see how the fluid directly on the surface of a given object is moving. This filter would also be applicable for cutting planes. When used in cutting planes it would be similar to projecting vectors onto the plane but with this filter it would just be small lines. I would find this part especially useful because I am doing a lot with aerodynamics, and this would be helpful to visualize vortices and the direction of the air perpendicular to a plane.
I have seen similar filters to the one I am describing used in other CFD software and I think it could be extremely useful for Sim Scale users for visualizing flow.