Shear two-point correlation functions (upper panel) and derivatives (lower panels) DV comparison for bin five between the mean computed from DUSTGRAIN mocks (orange) and theory predictions (black) for the fiducial cosmology (top), σ₈ (middle), and w₀ (bottom) derivatives. Fractional residuals are reported in purple on the secondary y-axis, emphasizing a 15% threshold as a gray-shaded horizontal band.