Why do my objects disappear from certain angles when played in the BGE I am new to blender and I was wanting to make a FPS game using the BGE.
I have my character and rig setup with the right arm a different object so it can move freely while aiming.
    I set up my camera in front of the seprate arm and when I played the game, the arm disappeared. When i viewed the arm from different angles and played the game, the arm appeared as normal. Does anyone know why this happened? I have some screenshots to help explain the problem.




The first image is the Normal view.
The second image is Viewed from first person.


Thanks in advance.
I'm not entirely sure why this is happening.

However, I found that joining the arm mesh to the rest of the character mesh (with &#9096; CtrlJ) (and joining the two armatures, also with &#9096; CtrlJ) fixed it.



My first thought is that the BGE's view frustum culling was hiding the arm, but if that's the case, I'm not sure why it doesn't also hide the entire character..