Material for the publication "The effects of planetary day-night temperature gradients on He 1083 nm transit spectra". Hydrodynamic model snapshots (in Athena++ hdf5 format), as well as 3D post-processed species number densities (hdf5 format), and the synthetic spectra (in ascii format) of models A100%, A50%, and A10%. Also included, the radiative transfer post-processing software used in our study, the modified Athena++ setup files, and a notebook to replicate the presented figures.