We support the following attributes for a material applied to a section of geometry:
Specular color (and a specular exponent)
Alpha (transparency, 0.0 completely transparent, 1.0 completely opaque)
We also support a diffuse texture map, which is currently used as a texture source for both diffuse and ambient color.
We store the following additional information, but do not have any support for rendering at this time:
Separate ambient map
Reflection map (expected to take the form of plane, cube or spherical mapping of reflection information)