Adywan has been posting updates on the Facebook Page on his work on the replacement asteroid canyon walls.
These walls are almost 10 feet long! This was one of the first things Ady said he was going to build a model of. The purpose is to replace these not-the-best FX shots from the original:
These explosions aren’t composited very well and don’t cast light properly.
Now this one has the highlights from the explosion painted onto the film, but it doesn’t look very realistic.
and when the painted highlights fade out there is absolutely NO detail of the canyon to be seen, yet the explosion should still be casting light onto the canyon walls.