Maybe Luke hallucinated a second Sun as he was dying from focusing so hard.
The novelization suggests that the Ach-To scene begins near dusk, continues overnight, and ends with the sunrise. If that can be realized well and without making the scene difficult to see, it could be a good way to imply a longer stay on the planet. Especially now that the 16-hour ticking clock has been removed. Yeah they’re in a hurry, but that specific element is gone.
RISE. Anyone feel up to the task? Obviously we will want to use jonh’s haircut footage once finalized, but the work done to the footage can be applied to this footage. This isn’t needed, but could be a nice alteration. I’d say better as subtle; I don’t want it to look like the theater’s bulb burned out. Just enough to convey the time of day using cinema parlance.
It’s pretty easy to make the first and last parts look like sunset/sunrise. Here’s a blanket grade I put over the whole thing pretty quickly:
http://www.framecompare.com/image-compare/screenshotcomparison/KGYZGNNX
The light would be reduced throughout the scene, with some power windows to keep the firelight and ghost effects bright. The trick would be to make part of it look like night. I assume the night would be within Luke’s hut, and would take some more dedicated power windows. Rey would be cast in shadow with a slight blue glow from Luke’s ghost and the bright sky outside would need to be darkened, but it’s possible.