This checkpoint adds Vivid PDXL to SDXL.
To get realistic, you gotta know the score:
score_9,score_8_up, score_7_up, score_6_up, score_5_up, score_4_up
I like adding "hyper realistic, digital slr", too, but I'm just copying @graizelle. It's pony based, so does what it's told.