Isley said:
I think you have me confused with someone else... I didn't say anything about an AT-AT leg or a shield flash :/
Sorry yeah I meant Lastjedi, whoops.
Will edit..
Darker sky works quite well for the effect but not sure about continuity of sky color so that is perhaps the issue but I don't think it would be that noticeable as a sky can vary depending on where you look. Or somehow blend the cloud at the bottom only to be darker but that is way beyond my rubbish skills