I haven't tested this, but I'm pretty sure this is why you sometimes see bright lights inside IVA after takeoff when waterfall is installed. Since the internal space and external spaces are in different coordinate systems, and the lights are in both layers, then they show up in the internal space but at weird positions (using their external coordinates, not where the engines appear to be).
If we wanted to support engine lights in IVA, there would need to be new code to make a copy of the light at the correct coordinates and layer, then keep it in sync with the external one. Not terribly hard, but just fixing the layers on the light model will at least fix the bug.
I haven't tested this, but I'm pretty sure this is why you sometimes see bright lights inside IVA after takeoff when waterfall is installed. Since the internal space and external spaces are in different coordinate systems, and the lights are in both layers, then they show up in the internal space but at weird positions (using their external coordinates, not where the engines appear to be).
If we wanted to support engine lights in IVA, there would need to be new code to make a copy of the light at the correct coordinates and layer, then keep it in sync with the external one. Not terribly hard, but just fixing the layers on the light model will at least fix the bug.