Overlapped textures and materials

Hi All,

I’ve developed a COLLADA parser. In some .dae files there are overlapping textures and materials. The problem is that my OpenGL renderer doesn’t show the textures but shows the materials. So my drawings are not so nice. OTOH, GoogleEarth shows the same files pretty nice; i.e. it shows textures instead of materials [when they overlap]. So I guess OpenGL should have some parameters to manage such a situation.
Do you know about this problem??

Or perhaps there is smth other that should be done with those overlapped textures/materials in .dae files???

Thanks in advance.