With the software renderer I get the error: "// Warning: Mesh shape polySurfaceShape1 has no triangles in tessellation. // "
With Mental Ray I get: "// Error: (Mayatomr.Geometry) : polySurfaceShape1: mesh has no faces, ignored //"
The black void is where the pebble should be, the sphere behind it is just to show that it's a black void.
And yes, all the render options are checked on the object!
Can anyone help?