Left panel: Herschel/SPIRE 250 μm image of the B211/B213 region in Taurus at the native beam resolution of 18.2″, but rotated in equatorial coordinates in clockwise direction by 37.4°. (see Palmeirim et al. 2013). Right panel: fully synthetic image mimicking the main features of the real image shown in the left panel, and resulting from the co-addition of a synthetic filament image and a synthetic background image. The synthetic filament image was based on the Plummer-like model of the B211 filament reported by Palmeirim et al. (2013): flat inner radius R_flat = 0.035 pc, contrast δ_c ∼ 6, and power-law index p = 2 at large radii. The background image was modeled as non-Gaussian cirrus fluctuations with a logarithmic power spectrum slope of −3 (see text for details), plus low-contrast filamentary structures resembling striations. The synthetic striations were placed such that their long axis is perpendicular to the main filament at a regular separation of 0.1 pc.