I recently came across the following vid on YouTube - https://www.youtube.com/watch?v=Df-_8VMH4pc

It appears to be using a plugin guitar synth (TH1) to emulate a real guitar amp setup via BIAB. In the vid it seems as though the plugin is only effecting the Real Instrument guitar track.

How is that possible? Can you put different plugins on seperate BIAB tracks - Real or MIDI?