Frames show what happens when pixel resolution of the magnetogram is degraded in a number of steps using a PSF convolution method. The left block of images show the extrapolations based on the original SOT data, and with a factor of 2, 4, 8, and 16 times degradation in spatial resolution for the BP1 and BP2 bright points. The right block of images show the original SOT data and a factor of 16 times lower resolution for the BP8 bright point. The photospheric magnetograms are shown using a ±200 Gauss range; following the standard biasing technique of the VAPOR package, the seeds for the field line tracing are planted at locations with very low values of the total field strength in a box stretching from the photosphere to several Mm height in the BP domain.