Of course no one has ever seen and no one will. But as you stated " we can see the gravity effects on near stars that ..... " There is something we can comparison for example: http://upload.wikimedia.org/wikipedia/commons/1/11/A_Horseshoe_Einstein_Ring_from_Hubble.JPG
I can say even more we can predict what is going to happen near BH:
http://upload.wikimedia.org/wikipedia/commons/0/03/Black_hole_lensing_web.gif
EDIT:
There is no chance for effect like this one:

You are absolutely right it is the most realistic, maybe because there is no other game like that.
It is not about the colour it is about distribution of stars, nebulae in galaxy. ETC.
I can say even more we can predict what is going to happen near BH:
http://upload.wikimedia.org/wikipedia/commons/0/03/Black_hole_lensing_web.gif
EDIT:
There is no chance for effect like this one:

...... I can say this game is the most realistic in terms of looks and physics of any space game to date. Nothing else comes close. ..... The galaxy does look very much like that to the naked eye......
You are absolutely right it is the most realistic, maybe because there is no other game like that.
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