Well in the mockup I posted, I only replaced two window panes with the BTS footage. In the left front window you can just see in the shadows the ESB cockpit door. The door is repeated in the BTS footage behind Han, which means that the perspective is shifted a good meter or so to the right at the back of the cockpit. I could line up the perspective more accurately, but if I do that then Han’s face is obscured by a window pane. Notice also that part of the BTS cockpit is curving down from the ceiling into the window area, which would need to be fixed.

So basically, I had to misalign the shots to create an acceptable composition. If I had a more straight-on view, the misalignment could be sold more easily.

If it’s not a big deal to anyone I could go ahead and work from this, but it’s not entirely ideal.