I am working on a game, and one particular object disappears when I press "P" to start the game engine. The scene this problem is occurring in was copied from another scene, and this problem didn't happen in the original scene that I copied from. Changing the normals had no effect, invisibility is turned off in the physics, and this object has no keyframes. All the other objects in the scene are visible. I am using version 2.69 of Blender. Any solutions you can provide would be greatly appreciated.