Star subtraction test on 100 Myr and 10⁴  M_⊙ King model clusters. 100 models per input parameter node (dot) were computed and 1σ distributions of their recovered parameters are repeated in all panels as open ellipses centered on the nodes. Shaded ellipses indicate distributions of recovered parameters after subtraction of N = 3 (top row) and 10 brightest stars (bottom row) of the cluster. Panels show: a) and d) results without these stars located anywhere in the cluster; b) and e) without these stars beyond cluster’s FWHM, arrows indicate parameter bias; c) and f) the performance of FitClust to iteratively fit model and include the 3 and 10 brightest stars detected freely with DAOPHOT.