Sensitivity test to σ_G. Multiplicative (left panel) and additive (right panel) shear bias differences obtained employing a Euclid/VIS pixel scale of $0\stackrel{″}{.}1$ and a quintic interpolation kernel, as described in Sect. 5.3, when we use extra Gaussian noise with σ_G = 2.5 ADU (test I with σ_G = 2.5 ADU), and a σ_G = 2.7 ADU (test I with σ_G = 2.7 ADU). The data points show the bias obtained from the fit with the error bars indicating 1σ uncertainties for a number of galaxies N_gal ≃ 8.9 × 10⁶ for each S/N value. For comparison, the shaded area indicates the requirements on uncertainty on the μ and c biases arising from the total shear measurement process for an Euclid-like survey (Cropper et al. 2013).