Populating polisurfaces with gemoetry

Hi!

As the title says, I have a problem with populating surfaces or flowing geometry on polysurfaces. If it's a simple NURBS surfaces I can do it. If the resulting surface is more intricate, complex than it is very likely going to be a polysurface. I can only flow Grasshopper geometry on single NURBS surfaces. I get the same problem when I try to subdivide polysurfaces as a whole. Is there a way to do it on polysurfaces?

Thanks for your help in advance...