Forward modelling images of the integrated emission intensity (in erg cm⁻² s⁻¹ sr⁻¹) of the cold tubes (the models ColdI, ColdR, and ColdV) for the 195.12 Å line. The observer is at a 0° LOS angle, perpendicular to the oscillatory motion. Half the loop length is modelled (z = 0 − 100 Mm). From top to bottom the ideal case at t = 10 P, resisitive case at t = 10 P, and viscous case at t = 10 P are shown. The driver period is P ≃ 171 s. A movie with the forward modelling for model ColdI is available online (Movie 2).