RCT Discussion / how did he do it?

I'm not quite sure what you're saying, but I'll try to make sense of it. If you merge the tracks on a vertical slope and then changed the original track to invisible, the game will crash because in order to merge, you had to have put vertical track. In order for it not to crash, you would have to merge the tracks at something that wasn't vertical slope. Even when you do that, the track that you merged on to will not become invisible, only the track that you change the track type will. Because of this, "track jumps" and the like are possible.

I've been trying to see if there is a way to get around the vertical invisible track thing, and the farthest I've gotten is any tower ride can be made invisible without the game crashing. Maybe if you could merge track onto a tower, or maybe something to do with the air launch coaster vertical track could work, being that air coaster vertical track is not the same as other vertical track. I haven't played rct2 in a while though, so if anybody could test these or something, I would really appreciate it.