What is this grapics lines called?

[Farabi]

I wonder how to revome this lines is?

[sinsi]

Looks like aliasing, can you switch antialiasing on in opengl?

[Farabi]

Looks like aliasing, can you switch antialiasing on in opengl?

Yes I can.

Did not aliasing is jagged on the line? That "aliasing" is Appear each time I enlarge the models too big.

[Tedd]

I'm not sure anti-aliasing would help much, you'd just get smooth lines instead.
I'd suggest mip-mapping the texture - this creates resized versions of the texture for use at different detail levels.

[baltoro]

ONAN-FARABI,
I'm not familiar with Open-GL,...but, in DirectX, that graphic element would be a texture.
Textures are loaded into memory and then painted onto a 3D surface.
Textures can come in a variety of formats.
...I'm assuming that Open-GL has something similar to a texture,...
Open-GL Texture Tutorial

[vanjast]

Those black lines would be the background ! if your screen in RGB type.

So it's either white lines drawn on a back background, or as Baltoro says a texture or DDS (Direct Draw Surface) with that region masked out.
:8)