Observed, true and reconstructed fields in a slice through the Supergalactic (left) and Galactic (right) planes for one of the validation mocks. Top row: observed galaxy numbers. The red cross marks the position of the observer at the origin. Middle row: true density (heat map and contours) and peculiar velocity (arrows) fields. The values represented by the contours are marked in the color bar. A reference arrow representing a velocity of 500 km s⁻¹ is shown on the right. Bottom row: corresponding NN-reconstructed fields.