Rail company First Great Western has released a video showing what the new refurbished Night Riviera sleeper service might look like.
Prime Minister David Cameron is expected to announce an overhaul to the service when he visits the county today.
It comes as part of a £150m investment package to help improve Cornwall's rail infrastructure and create new jobs.
The deal includes refurbishing the London to Penzance sleeper train, as well as upgrades to signalling which could pave the way for half-hourly services between Cornwall and the capital.
It will also see the expansion of a train maintenance depot at Long Rock in Penzance, which the government says will create more than 60 new jobs.
