The toilet's 'open' animation is initiated by the 'walkInside' behaviour when a guest arrives at an access square.

The problem is this behaviour also does a bunch of other stuff to make the guest 'walk inside' the facility. I'm also not sure how it would interact with a 'vendingMachine' behaviour, if both behaviours were attached to the same object.

If you want to try 'walkInside' you could set 'walkToCoord' as 0,0, then I suspect the guest will just stand there for whatever 'insideTime' is set to. That's OK. But then they'll probably immediately swivel 180 when they finish which will look a bit bad.

Unfortunately, it does not look like I've added the ability to have an active animation for any of the other facility styles (seat and vendingMachine).

Honestly, I could have designed this whole system to be a bit more modular. A separate behaviour for animations would have been better. We live and learn - I had no idea Megaquarium was going to be such a hit with modders when I wrote a lot of the code! ;)

Well, a couple of months late, but I managed to have the walk in behaviour working. The result is guest not being rendered, likely a processing optization since they are inside the toilet. They never turn visible back even after leaving the facility resulting in hold objects flying over the place.

The vending machine and walk in properties seem to work together as they indeed consume the product for sale.