I was heavily into model railroading in my teens, which I credit for keeping me sane through those insane years, and even today enjoy being delayed by freight trains thundering through our road crossings.
Which is why when a train-related CAD-oriented press release arrives in my Inbox (not very often) -- with photos! --, I take notice. Here a British firm mounted a brand-new point cloud scanner on what must have been the oldest gondola car they could locate on the rail system:
And here is a sample result from the rail-based scanning system:
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