I have placed imported .obj mesh shapes onto a reflecting floor in Maya. I have shaded and textured these objects (bottles with labels). They do not reflect onto the floor.

Howerver, If I create a nurbs or polugon shape in Maya and use the same shaders and textures as the .obj shapes, they do reflect off the floor as well as off each other.

Is this a limation in Maya and imported .obj files or am I doing something wrong?
See Attached


Thanks