Class 150 has BSI coupler but can't be in formation with Class 142, 158, 166, which also have BSI couplers Class 323 has Tightlock coupler but can't be in formation with Class 313, 314 or 465, which also have Tightlock couplers Class 801 can't be in formation with Class 395 even though they both are from the A-train AT300 family, though I don't know if they can couple in real life or not TGV can't be in formation with other trains with Scharfenberg coupler, though I don't know if would be possible in real life either
I tried a consist that I sometimes see in real life, kinda, with what the game has - Taurus + dosto coach + 1st class IC + 2x 2nd class IC + dosto control car... IRL it is sometimes Taurus 1016, sometimes Herbert 1144: and it works like this - if operated from the loco, it works... if I try to operate it with the control car, some stuff clearly feeds through - I can raise pantograph or lower it, I can open/close circuit breaker (I hear the noise it does when you close it), I can open and close doors... but I cant get the power/throttle to work from the control cab... and clearly IRL such consists work... sooo... I guess I have found sth that I hoped would work once formation designer launched, but it isnt... hopefully till full release it gets better now I am going to try putting together more ICE 3s than was previously possible lol, will let you know
more stuff - it still looks really like a beta - there is a huge clutter of models, you cant really see what you are putting out until you click it, so you are kinda blind now - cant even put together an ICE3 formation properly... would be nice to have an option to add official consists as basis for your own... so my superlong ICE plans will have to rest... for now
https://www.trainsimcommunity.com/m...-creations/i4163-coupler-mod-class-377-rog-v3 take a look at the mods section on the train sim community website, theres a guy in the pc editor section who has added/modified couplers on loads of stuff to work as it should. ROG 37 has about 6 different variations on there, hes done tightlock, dellner (that works with 801) screw link, buckeye and schaffenberg. hes also done multipule unit ones too that make them compatible
I just wrote in a seperate thread on how US cab cars and locomotives should all be able to work with eachother but how in TSW the scripting has not been kept the same for some resulting in some combinations being undrivable from the cab car when in reality they all should talk to each other fine due to how the standardized AAR MU system works.
This is a known bug with the Rivet 150, and is not specific to the Formation Designer. If you spawn a 150 and one of the others in-game and attempt to couple them, Bad Things will happen. I'm unsure whether the EMUs you mention can operate in multiple with each other, even if their couplings are mechanically compatible. In particular, the 323 is AC powered while the 465 is DC third-rail powered, so only one of them would be able to provide traction power on any given line, and the 465 would not be able to control the 323's pantograph and circuit breaker. The 313 and 314 are also camshaft-control units, which have sufficiently different behaviour from the 323's AC inverter drive that operation in multiple may be excluded for that reason, even with compatible traction supplies. Very often in these cases, the electrical part of the coupling is made deliberately incompatible.
Two trains having identical couplers does not always mean they are compatible. As you've said the 150, 142 and 158 are compatible with each other but a 166 is not compatible with those as the coupler is flipped in real life.
When Formation designer comes out for console, I had this idea to make a Railjet livery for the ICE 1, then remove both power cars and replace them with two BR 182's with railjet liveries... sort of my own cheap console Railjet.
Sort of on this subject, a few vehicles with changeable couplers spawn in with the wrong coupler out but still connected in formation. For example I have top and tailed 47s with some ntp mk2s in between and the mk2s are coupled to the 47 with their buckeye to the screw link
