Three-dimensional visualization of the 3D MHD model with the line-of-sight magnetogram of the AR at the base layer. The magnetic flux density is coded in grayscale with a saturation level of ±300 Gauss (black and white). At a height of 3 Mm we overlay (half-transparent) the vertical component of the Poynting flux with a saturation level of ± 50 000 W / m² color-coded in blue-transparent-red, where the zero level is transparent. The EUV emission of the Fe xv line extracted from the model is color-coded in orange-red-transparent and the field lines crossing the respective emission maxima are drawn as tubes in red (SL 1), yellow (SL 2), green (SL 3), light blue (CL 1), and dark blue (CL 2). The black box boundaries indicate the central 117 × 117 Mm² AR core area.