David Gilmour confirmed the slide guitar on 'Wish You Were Here' was modeled after a specific Blind Willie Johnson track

Yes, David Gilmour has explicitly said the slide guitar part on “Wish You Were Here” was an attempt to replicate the sound of Blind Willie Johnson’s “Dark Was the Night, Cold Was the Ground.” In several interviews, he mentioned that Johnson’s raw, vocal-like slide work on that 1927 gospel-blues piece was the direct touchstone. Gilmour wanted to capture the same lonely, crying quality—so he played the solo