FP relation produced by the merging of gas‐rich disk galaxies with dark matter halos, star formation, supernova feedback, and a prescription for feedback from accreting supermassive black holes. Shown are remnants produced by mergers appropriate for redshifts ﹩z=0﹩ (black circles), ﹩z=2﹩ (red diamonds), ﹩z=3﹩ (blue triangles), and ﹩z=6﹩ (green squares) with nearly radial, parabolic orbits. The merging of pure disk galaxies using our full physical model produces an FP nearly parallel to the observed infrared FP (Pahre et al. 1998b) and nearly coincident with the FP produced by similar simulations without black holes. The FP relation is roughly independent of the redshift scalings of the progenitor systems and the location of remnants within FP is fairly insensitive to a large variety of disk orientations (purple pentagons) and orbital configurations (orange hexagons), as changes in the effective radius are compensated by changes in the velocity dispersion and surface mass density. For comparison, the best least‐squares fit to the FP delineated by the remnants is plotted (solid line). Also shown is the mean deviation induced by line‐of‐sight variations in projected quantities for a given remnant (detached error bars).