Even if programing wise they can't get the continually moving platform we can have one leave when one enters. Most importantly with an Omnimover is turnning the cart to control field of vision on a dark ride.You mean an omnimover?
There are many variants of this, from ghost trains to, as you say, the haunted mansion. Some ghost trains work by having a slower station (but still moving) and then once the car leaves the station it speeds up again. With rides like the haunted mansion, there is a moving walkway for you to board the cars, so the trains work at a constant speed.
So +1 to this idea [happy]
Somebody completely redid the haunted mansion but it was all mods.Even though it was not an omnimover, didn't someone make a ride where the cars could be turned to control the field of view in RCT3?