Viewport shows suddenly strange artefacts

[sykane]

Hey,

as you can see my Viewport started to show strange Artefacts, im not sure what I did when it started to happen... already tried to deactivate OpenGL preview, but It didn't help.

thx in advanced

[TomG]

That looks like overlapping (coplanar) geometry (where sometimes it decides to display the surface from one object, other times the other surface). By overlapping, I mean where the surface of one object is exactly in the same place as the surface of another object - it's fine if one object protrudes into another.

[sykane]

oh, ok... is there any way to find the parts wich cause the trouble?

[TomG]

You can test to find out if it is the cause by moving one of the two potentially overlapping pieces of geometry, and seeing if the effect goes away :)