Minor performance issue

I got next simple question. Is it a big computing overhead for Panda to render many faces that are not visible (looked from the “transparent” side, like the ball from inside)?

as long as they all belong to one or just a few nodes it shouldn’t be much of a problem. if you have a lot of nodes where these faces belong to you could run into performance issues. i already hat around a million triangles on my screen and still had reasonable frame rates (and they where visible). try the render.analyze stuff . or maybe pstats to find the bottleneck (if one is present)