I was using the SFBT tram mod and using a reskinned tram. Both would show up on the tracks at the same time. The reskinned tram has much smaller cars so they flow along the track. The SFBT one is a single car and looks fine in the stairs, but bounces and looks janky going through turns. Is it possible to reskin the SFBT tram to be smaller cars or use 2 different trams at once? Im just trying to add a little variety to my tram lines. Is there a replace and addition tram option like there is for heavy rail?
The automata in the SFBT tram mod are extras - though I think one of them replaces the standard Elevated/GLR train (not sure, pls check the documentation). The SFBT stations are special too, they have scripts that spawn automata, so you need to have their colour-coded parts of the track separated.
The standard Elevated/GLR trainset is quite easy to find (use the reader's Navigator Tool) and mod. In general, you can define trains as an engine plus cars consist, not multiple units. To make a MU-like train, you can simply use the same model for the engine and the cars. I think car automata (and maybe engine too) may be added to the existing ones, not just replace them. This might be OK for freight cars (they will be added to the original set), but for passenger trains it's not, because if you define an additional car and/or engine (rather than replacing the originals) the game will be selecting them randomly, and you will thus be getting... inconsistent consists! So, for passenger trains, you may have only one trainset, unfortunately.
Of course the commuter (or "passenger", or "heavy") rail and elevated (or "GLR", or "light") rail cars are different, but their networks are separate too. One could mod a station so that it serves both, spawning both train types, and train automata can indeed run on GLR tracks, but this looks really weird - the opposite actually happens in many places of the world, where light/suburban trains may have their services extended into the regional/mainline (heavy) rail network. This can't happen with the existing rail network, because it does not contain (heavy) rail paths, and as far as I can guess they won't conduct real (heavy) rail traffic either. To make this work (ie have a part of the trackage used by both heavy and light rail, and have different train automata running on it) requires quite an amount of work, ie a set of puzzle pieces and some new (or modded) stations too.