Spline based on the design of the Anglo-French Channel Tunnel, a 50km long undersea rail link between Britain and continental Europe. This model incorporates a level of detail change at 400 metres to assist framerates. Polygon count is 1114/544 per 30M.Another model created in Google SketchUp and exported to Trainz with RubyTMIX - thanks to MJModeler for his efforts to make asset creation easier.