Function glow_normal_at_wpos_inner 

fn glow_normal_at_wpos_inner<'a>(
    chunk_boi: impl Fn(Vec2<i32>) -> Option<&'a BlocksOfInterest>,
    chunk_glow_map: impl Fn(Vec2<i32>) -> Option<&'a Arc<dyn Fn(Vec3<i32>) -> f32 + Send + Sync>>,
    wpos: Vec3<f32>,
) -> (Vec3<f32>, f32)