Auxpecker is an easy and free solution to get a pleasing realtime preview of objects directly on the viewport of Rhino3D v4.0. It is simply based on the use of environment maps; making viewport objects reflect in ways that reproduce / approximate the look of various materials. This technique is not meant as a preview for rendering in association with any render engine. It is a stand-alone method for communicating very pleasantly, in realtime, projects to your client.
Auxpecker 1.0 come with a complete collection of pre-installed material maps and a plug-in for Rhino 4.0 allowing you an easier selection and us of the maps.Roberts Review:
A Free Rhino 4.0 plugin to make quick real time presentations. It applys materials to a Rhino Model, comes with a fair amount of materials. Note - you need to turn on viewport rendering (right click on viewport name and choose render.
For more detail http://auxpecker.blogspot.com/