Function bake_prop_with_turn 

pub fn bake_prop_with_turn(
    gpu: &Gpu,
    scene: &BakeScene,
    spec: &PropSpec,
    bounds: PropBounds,
    samples: u32,
    seed: u32,
    turn: impl FnMut(usize) -> Result<(), String>,
) -> Result<PropArtifact, String>