Radiative transfer verification of petitRADTRANS. Uppermost panel: comparison between the emission spectra of a clear TrES-4b-like atmosphere, calculated with petitRADTRANS in high-resolution (“lbl”) mode (light red), and in low-resolution (“c-k”) mode (black, thin line). The red line denotes the re-binned high-resolution spectrum. Panel below: residuals between the two modes. Second lowest panel: comparison between the transmission spectra of the same atmosphere, for both modes. Lowest panel: residuals between the two modes, for the transmission spectrum.