@peterdrake you stretched the last arch a bit. It needs to be about half the size 
@laskov Meaning the rightmost one? Too tall?
@peterdrake hi, by the "last" one i mean the most distant one where it goes to the vanishing point. they are two last ones one to the left one to the right, i hope i didn't confuse you even more
@laskov Ah, I see, too wide. Thanks!
