Another thing to do is increase the Hither setting on the camera until the front wall disappears. The Hither setting is for objects closest to the camera, the Yon setting is for the objects farther away.
From manual:
- Hither : The Hither parameter controls the distance of the near clipping plane. Objects (or portions thereof) closer to the camera than the hither distance will not appear in your view pane.
- Yon: The Yon parameter sets the farther range of the far clipping plane. Objects (or portions thereof) farther from the camera than the yon distance will not appear in your view. The Yon parameter is only applicable with OpenGL hardware rendering.
