There were two bits of video of the shuttle flying away from the battle, and I just reversed those videos and color-shifted the engines to appear more like the front of the ship. So I used video of the shuttle with a luma key to remove the sky. If someone wants to do a 3D version or something, they are more than welcome, but I don’t know if that would be necessary if the shuttle is as far away as continuity suggests.

A problem with any of these ideas (TIE attack or shuttle) is something that Sir Ridley has said - it’s not very JJ Abrams to have a shot of something slow moving and far away in the sky, so whenever I tried that with the shuttle it didn’t look like the style of TFA, which is why it moves so fast.