Left: resultant BH mass versus He core progenitor mass for models including the extended screening and relativistic screening. The PPISN-PISN cutoff lies between 89.02 M_⊙ and 89.05 M_⊙ for the default screening model and between 89 M_⊙ and 89.02 M_⊙ for the relativistic screening model. Green circles correspond to default screening, and red squares correspond to relativistic screening. Right: relative shift in the resultant BH mass when relativistic screening is used compared to the default screening model.