Visible Polys (edges)??

[ruuterdetuuter]

Hi, Can anyone tell me what this is? Somehow my polyedges are visible in the mesh...

It is a normal subdivided mesh, couldn't figure out what causes it... I've played with the smoothness and the UV, but no luck so far

Thanks in advance.
Ruud

[promity]

As i can remember you need to play with ray epsilon parameter - increase this.