Modal bispectrum reconstruction for Planck 2013 (top left) and 2015 (top right) temperature-only data, both using the SMICA maps. Here, we restrict the 2015 resolution to the same as 2013, using similar polynomials with n_max = 601. The two bispectra are very close to being in complete agreement in the signal-dominated regime shown up to ℓ_max = 1500. In the lower panel, we show the Planck 2015 temperature bispectrum at high resolution using the full n_max = 2001 polynomial modes. Large-scale features in the top panels become subdivided but the main 2013 signals remain, notably a stronger measurement of the ISW-lensing signal (the regular oscillations in the squeezed limit).