Disappearing Walls?

How come everything is different from blender project view, render view, and BGE view?

Project view the textures are right, but the inside walls are missing?? The outside shows, but it’s wireframe inside the house.

Render view everything is correct.

BGE view, no walls inside again, and the wood texture is changed to the roof material??

error1.jpg > Project view
error2.jpg > Render view
error3.jpg > BGE view

In the texface options set all the faces as two-sided, otherwise they’ll only render when the front is seen by the camera as the backface culling for that face is enabled.

Two sided is on in the edit (F9) panel