spiffy101
If you want to see the boiler of your 2-8-2 from the cab, you will have to create your own interior. if you do move outside the cab, it is most likely that all you will see is the boiler with all the rest removed to reduce the poly load. I doubt that you will see the wheels and motion gear, the interior view is just that, it does not include bogies.
Cheers
Narrowgauge