In your LD, did the sky ever change color? 
Moved from Quest for Lucidiy 
You know, other than clouds my sky has actually remained pretty constant. On one or two occasions I remember a red sky, but it has never changed in a dream itself.
I remember one time where the sky changed from blue to red and yellow-orange, because the LD was set in the morning I think the color changing had to do with the sun rising