The Japanese are at the forefront of tryig to develop technologies of opticl disturbance…in Star Trek, these would be called cloaking devices. It is literally the stuff of science-fiction, at the moment.
In practical terms, their most successful efforts are based on reflective surfaces and stealth geometry.
This is a computer generated image of an invisible train.
I guess they would tidy up the interface between track and carriage. All those boxes need hiding.
Personally, I like looking at trains. Making them invisible seems a bit pointless.
Still it does look pretty cool.