Sometimes, you can also get "inside" things by scaling the camera smaller. But I agree with Ockham, either use the grouping tool to "cut a hole" in the side for the camera, or make a transmap :)

FREEBIES! | My Gallery | My Store | My FB | Tumblr |
You just can't put the words "Poserites" and "happy" in the same sentence - didn't you know that? LaurieA
  Using Poser since 2002. Currently at Version 11.1 - Win 10.