Evolutionary tracks in the HRD for the 30 M_⊙, 60 M_⊙, and 85 M_⊙ models (from top to bottom) at solar metallicity (left) and LMC metallicity (right). The shaded red area indicates the domain of the RSG phase (log(T_eff [K]) < 3.7), and the shaded gray area indicates the domain of the YSG phase (3.7 ≤ log(T_eff [K]) < 4.0), as defined in GENEC for the application of specific mass-loss rates. The triangles mark time-steps of 20 000 yr starting from core helium burning. The onset of the WR classification is marked by dotted squares and circles, for models using Vin01 and Bes20, respectively. The blue dashed line indicates the Humphreys–Davidson limit (Davies et al. 2018; Lamers & Fitzpatrick 1988).