Open D is the secret, but standard tuning can fake it.

You can replicate the chord progression in standard tuning, but the voicings and the whole vibe will be different. The open strings are doing a lot of the work.

Julia Jacklin plays “Lydia Wears A Cross” in open D (D-A-D-F#-A-D). That tuning gives you a drone on the low D and A, and you can play major chords by barring all six strings with one finger. The result is this ringing, slightly unstable sound because the open strings keep ringing into the next chord. In standard tuning