Render only visible stuff and improve performance?

[xNaXDy]

I was wondering if there was a way to not-render all of the hidden faces of a - let's say - cube so when there are 50 or 200 cubes aligned, and you stand on top of them, only the top face of each cube will be drawn. Is this possible? And will this actually improve performance?

[EgonOlsen]

It's possible, but the engine can't detect that case. You would have to do it in your own code somehow.

[xNaXDy]

I see, is there any other method of improving the frame rate? (I'm new to the 3d stuff as you can see )