Model spectra of a B5 star considering four levels of resolution, from Ν = 300 (first panel) up to Ν = 320 000 tiles (bottom panel). Again, the absolute differences with respect to a reference model with Ν = 500 000 tiles are expressed in continuum percentages. It can be seen that, for models with more than Ν = 180 000 tiles, the residuals are lower than 0.025% within the line cores.