Stellar mass functions for LRG in the DESI One-Percent Survey (points) and the mean of our UCHUU-LRG lightcones (solid curves) are shown for several redshift bins within the range 0.45<z<0.85. The dashed curves represent the complete SMF adopted in each redshift range, indicated in the legend. Data error bars and the model shaded area represent the standard deviation of our set of 102 UCHUU lightcones.