Evolution of measured luminosity vs. measured accretion rate for our κ = 0.01 cm² g⁻¹, simulation run. Sufficiently resolved simulations show behaviour such that the measured luminosity and the measured mass accretion rate correlate well. Unresolved simulations however run into a state of zero accretion rate, but finite luminosity, which remains higher than that of the final luminosity in the resolved simulation. This hints at numerical effects or other physics providing an additional energy source in unresolved simulations.