.FBX import - Distortions

[alex.bannerman]

Hey guys, I've imported this .FBX file of mechanical components. Has anyone experienced this in the viewport?

The output render has been somewhat in between these to images i see in the viewport. 

In the viewport the models flicker to all kinds of distortions

[mikhailkonstantin3d]

yes i had, and my experience with it that it usually can't be solved, because the normals aren't flipped here, the faces just very much close to each other when extruded or beveled, not a clean mesh, just try something it may help, select it all and apply the existing material lambert 1 it may help fix this problem, but in the render i don't think those blacks will be seen