Actually, I'm not all that new, I've been reading tons of posts recently, I only joined so I could post probably just a few times...
But anyway, I think the "scar" is caused by the saber's glow and it's only apparent on the one side because of the blue contrasting with the red of moon or planet or whatever it might be. If you look really closely, you can see the cloud just behind the glow of the saber in that spot .... so I don't believe it to be a texture alignment problem or anything like that..
That's just my opinion...
P.s. Thanks for the welcome.
I prefer what was to what now is;
'Cause what was wasn't what now isn't.