Differential granulation effects, i.e. differential 3D−1D abundance corrections δ Δ_3D-1D A(Fe), between optical and IR and between NIR and IR wavelengths derived from moderately high-excitation unsaturated Fe lines for dwarf stars as a function of effective temperature. Filled and open symbols refer to Fe I and Fe II lines, respectively. Circles and triangles represent lines with a lower-level excitation potential of 3 and 5 eV, respectively. Blue (green) symbols indicate differential corrections between optical and IR (NIR and IR) wavelengths. Abundance corrections are computed for fictitious lines with the same normalised equivalent width, EW ∕λ, and corresponding to a value of w_λ = 4 pm at λ = 850 nm.