Transparent mesh issue

Hey guys i made this epic land, and i want to use it in the blender 2.6 game engine. The problem is when i run the engine, the land mesh is transparent at some parts. Kind of like if the meshes normals were inverted at some points. Does anybody know wat the problem might be?

Additional info:

  • Im not using GLSL, im using the SingleTexture.
  • I checked the normals of the mesh, They are all facing the right direction.
  • Even when i create a cube and add a texture to it, it does the same problem.

Quick like that I don’t really know but if I had to guess I would put the fault on single texture.

I have tried to put a texture on a simple cube in single texture and it “worked fine” for me. I don’t have any transparent faces in it.

If you upload a blend file with a problematic object in it I can take a closer look.