Evolution of the 150 M_⊙ star on the HRD using different methods to obtain the effective photospheric temperature T_2/3. The solid black line shows the unmodified output of the GENEC track, and the square and circle scatter points show the output of the PoWR deep and shallow model series along the evolutionary track. The five nonsolid lines follow the approximated wind-corrected photospheric temperature calculated from the GENEC structure models via the method outlined in Sect. 5.5 using different assumptions for the connection radius R_con (see main text for details).