PLOT3D IBLANK data
 

Does the IBLANK information actually mean anything to Paraview?

I eventually read a PLOT3D file into Paraview by deselecting multigrid toggle in Paraview, and then omitting the nblock line from top of plot3d file. Such that first line of the plot3d file is just the 3 integers:

imax, jmax, kmax

But having got that to work, I cannot see any effect of the iblank data, which I have included after the point data, in the plot3d file.