Can't get 3d plots in Paraview

Been using Viper for a long time, and can get 3d plot in Viper.

Now want to do animation, so downloaded and installed Paraview.

But I can only get 2d plots in Paraview -- it won't use the z range info. It will do animation, though.

(May be a paraview question ... but hope you can help).

I have tracked the problem this far: In the .vtu XML output, Paraview is only using <Points>, which b/c of my mesh all have a z-coordinate of 0. I need the <PointData Scalars = "u"> data to replace the z-coordinates of the <Points> data; or do the equivalent in Paraview.

I've tried working with project(w,V), which works fine but doesn't seem to fix the problem in Paraview.

Maybe I am using it wrong?? Any help greatly appreciated...

At least, before I write a script to fix this problem, maybe someone has already written such a script???

mesh = Rectangle

file = File("PNLSoutput.pvd")

     file << ( w,t) # inside my time loop

plot( w)

interactive() # last frame is shown correctly in viper