Four synthetic datasets based on two realizations of two standard M87^* models are presented. GRRT frame numbers are displayed in the top left corners. The top row shows the total intensity ray-traced ground-truth model images on logarithmic scales with varying dynamic ranges. Visibility amplitudes on a logarithmic scale and phases of corresponding synthetic data realizations are displayed with thermal noise error bars as a function of baseline length in the middle and bottom rows, respectively. The measurements shown can come from different orientations at the same baseline length. For better readability, the visibilities have been averaged over scan durations, amplitudes lower than 0.008 Jy have been clipped, and the values of the different Stokes parameters are each offset by 50 Mλ on the x-axis. Spin a_* = s and R_high = r parameters are listed in a shorthand notation as a_s and R_r in the top-right corner of each model image.