a), d) Near-IR (J, H, and K photometric bands) and mid-IR (3.6 and 4.5 μm) radial profiles of the dust populations described in Sect. 2.1 for the control cloud defined in Sect. 3. b), e) Influence of a surrounding diffuse envelope on the scattering spectrum. c), f) Influence of the radiation field intensity. g), j) Influence of the cloud central density. h), k) Influence of the density at which aggregates are the dominant dust population. i), l) Influence of the cloud density profile steepness.