As stated, I have a thin, blue line running horizontally across the screen (note the line just above the tail). Is this what is referred to as a "tear"? I have vsync enabled in both full screen and window mode. Also have tried it with an external limiter on and off but no change there. Is this related to vsync or is there another ajustment I need. This is using an Nvidia 580 card. thx,Clutch

Hard to tell from that pic since its so small, but I think you are looking at the base of the clouds above the tail which apprears as a straight line. The easiest way to test it would be to try some other weather themes, creat your own, download the weather, or try a clear sky and see if the line is still there, but from that pic it just looks like the base of a cloud layer to me.

Ok, I re-inserted a larger, more detailed screenshot. If you click on it, it will enlarge to reveal in more detail. I too first thought it was just the edge of the cloud layer but at closer observation you can see this line moving (shifting, oscillating?) very slightly even if I am at a stand-still position.Good idea about trying different weather. A quick tests seems to suggest it only appears with clouds. If I choose clear skies I see no line. And it might only happen with cirrus or high elevation clouds. Still experimenting.

Yeah, this looks like a weather engine - or weather configuration problem: it looks like the bottom of a cloud layer, doesn't it? So - what weather engine are you using?

That is using the default clouds and the default weather engine. The selection where it appears most prominent is when using the Fair Weather theme. Using real-world or some of the other themes it goes away... Mmmm interesting.

Adjust your cloud draw distance and see what happens.

Saw your thread title and thought you were talking about law enforcement.

ha, my little play on words to get your attention... guess it worked. ;)