I am having trouble with using north_vector--basically it is doing nothing as I am writing it.  As far as I can tell there are a few ways I can call camera, and I am doing this:

   scall = yt.create_scene(ds)
    source_all = scall[0]
    source_all.set_field('density')
    source_all.set_log(True)
   
    #cam = scall.add_camera()
    scall.camera.set_width(ds.quan(80,'kpc'))
    scall.camera.position = ds.arr([0.5,1.0,0.3],'unitary')
    scall.camera.focus = ds.arr([0.5,0.5,0.36],'unitary')
    scall.camera.north_vector = ds.arr([0.0,0.0,1.0],'unitary')
    scall.camera.resolution = (2048,2048)

What I want is a nearly edge-on view of a disk in the x-y plane where the disk is aligned on the x-y plane (horizontal) and instead I get the picture below.  I have run this with the north_vector line commented out, with it as ds.arr([1.0,0.0,0.0],'unitary') and as np.array([0.0,0.0,1.0]) and always get the same image.  Any help is always appreciated!!  

Thanks in advance,

Stephanie