I discovered that the couples of my tram went missing (well, technically I found out this a few weeks ago, but forgot it).
If I add the models of the coupling to the animation of the coupling (coupling type animation), they just simply doesn't appear in LOTUS. If I don't select them to the animation, they don't disappear, though they don't move then.
I don't have any visiblity variables on them, only the coupling animation (which is parented to the coupling settings in General options).
I have absolutely no idea what can possible cause this. If I couple this tram with the GTN (I know it's not really realistic ) I get another interesting issue:
(I don't know if this is a bug maybe, or I made up something, that's why I opened this thread here)