The black hole in the screenshot was one of two in the system. The effects at the first were much less noticeable, as I approached it with the background mainly black. I was rather disappointed with it, but then with the next I thought to adjust my approach and yes, the effects were interesting. There was a whirlpool effect which varied as I adjusted the attitude of the ship. There were also what seemed to be small stars circulating the black hole at times (looked just like fireflies!).