Object Flickering

I am currently working on the objects for my new coaster. I am new at making objects but they are coming along nicly, except on the top of my tunnel the snow sections are flickering. How can I remove that?

[Dirk_Ermen]

add a little more space between the objects, if you almost merge one object into an other object usually the textures go flicker...

Yeah, don't make the faces overlap each other, keep the modeling simple and making sense, be reasonable with the polygons. In other words, you don't need 50 blocks to make a roof, when a single one will suffice.

And if you were to make parts connecting perpendicular to the object, make the 'sub' part a wee bit shorter so its actually embeded in the 'pro' object.