About 3 or 4 years ago I'm sure there was a procedural shader that create the look of modelling clay. It was posted as a screenshot in the Poser forum. It lacked the fingerprints that you sometimes get on those models, but you could probably add some in using a bump map. For animation you would maybe need to animate the material settings slightly to get the variations in surface as the model is moved. Just did a very quick search here and couldn't find it. May have been at "The Node Cult" section of the Poser forum at RuntimeDNA.

Daz Studio 4.8 and 4.9beta, Blender 2.78, Sketchup, Poser Pro 2014 Game Dev SR5 on Windows 8 Pro x64. Poser Display Units are inches