Prussian 4-4-0 steam locomotive from 1898 with interior cabin controls! Runs on a 1.4 meter (4.5 foot) gauge. It was later renamed 'BR36'.

Scale model is very detailed and includes realistic piping, cab controls, braking system and valve gear. Scene contains several arch&design materials / lights and was rendered in Mental Ray. No texture maps have been included. Model is divided into numerous parts (eg: boiler, wheel, frame, tender etc). All valve gear components are separate, all cabin controls are removable. Note that model does not contain any instancing, and cabin controls (levers and such) don't always have perfect pivot points.

Just a quick note - the colorful render with the cabin (image 8) was done to illustrate this model's capability. You'll have to tinker with the lights a bit before you can obtain a similar result.