Effect of the orbital separation on the reconstruction quality. From left to right: the time-averaged over 3.7 days theoretical emission map of M87* at 230 GHz (the model with 8.9 h between frames); frames of the movies simulated for the EHI with 30, 400, and 1000 km orbital separations, each lasting 3.7 days, reconstructed using snapshot imaging (to highlight the effect). The source is varying during the simulated observation. Colours indicate brightness/pixel in mJy (square root scale).