Low-wind effect on the ELT. (top) Three pupil configurations with the full ELT pupil and the shaped pupils HSP1 and HSP2 of HAR-MONI/HCM, and their associated PSFs in logarithmic scale without low-wind effect (center) and with the low-wind effect phase map of the left column (bottom). The phase map is composed of petal-level pistons, tips, and tilts with average values and variances equivalent to those of VLT/SPHERE before the spider coating (here ~110 nm RMS of piston and ~180 nm RMS of tip and tilt at 1.6 µm).