Reconstruction of magnetic structure of AR 12635 in higher (a) and lower (b) spatial resolution. The thick dashed line circumscribes the computational domain. The violet contours represent a neutral line at a height of 1 Mm (a) and 3 Mm (b). The gray background is the soft X-ray image at 06:04 UT (a) and the radial component of the photosphere magnetic field (b). The XRT image was displaced by 20 arcsec to the east and 15 arcsec to the south.