Accuracy of the emulator for baryonic effects on the matter bispectrum R(k). The upper two rows show the lower and upper 68% percentiles of ΔR(k), and the two lower rows show the lower and upper 95% percentiles of ΔR(k). Each column is for a different k₃ value, which is by construction larger than k₂ and k₁ but smaller than k₁ + k₂. The black circles show the actual location where we have measured B(k₁, k₂, k₃). The background is coloured using a linear interpolation/extrapolation of the percentiles between the measured k-values.