[HELP] Weird lines on my static meshes

[Daemon Vanderpool]

It seems when I get to a certain distance away, and/or rotate the perspective, these dark lines appear on all of my meshes, I don't know if it's the light maps or what. I tried changing the lightmaps on one of the meshes to see if it was a problem with not having them lined up properly on the grid but they were still there after I brought it back in. Any ideas to help me remove this would be very appreciated!

[JessieG]

I typically only see this before the lighting is built on landscapes with a dominant directional light. Are those static meshes or did you convert them to movers or kactors at some point? And this shows up after building the lights?

[benfranke]

Looks like z-fighting (a depth buffer issue), check your meshes for overlapping surfaces, check your video card settings or update your driver.