vanished objects (from specific angles)

[Rends]

I have a 500+m  fence but viewing from specific angles the fence vanished.

If i move a a bit from left to right it's there or it's gone.

Any ideas how to fix that?

[+russouk2004]

I think its the tga doing it....fence texture maybe needs two sided in 3dsmax?...dunno lol

[Rends]

The fence is already made out of two single sided objects .if you would move to the other side of side of the fence you would see the second fence object facing the opposite direction. They also don't share the same location. I moved them a bit apart to prevent render problems.

Maybe the object is too large for a 4 vertices object. If nothing helps i will split the fence in smaler peaces.