Smoothed density profiles using different boundary treatments for two characteristic lines-of-sight. The boundary is indicated by the dashed vertical line. The original data is shown as a gray line, and the extrapolations beyond the boundary are shown at decreased opacity. The top panel shows a line-of-sight with a peak near the inner boundary, while the bottom panel shows a line of sight with a steep decline near the boundary. With reflective boundary conditions, the peak is missed entirely, while simple normalization adds a spurious peak even in the case of the steep decline.