Maybe this can interest you (with the actual/next Polygon converter of Max Smirnov)
(of course it's like Grasshopper from Rhino, only for Nodes' lovers! :)

http://www.world-machine.com/ (the free version is sufficient for some crazzy things! )

For export you must "draw" a node "Mesh OutPut" (seems only OBJ ? )

There are some Voronoi, Perlin etc... functions! The Manual is a model!



and this guy has made some many tutorials! Vladimir Chopine http://www.youtube.com/user/GeekatplayStudio/playlists

You must decimate your model with free MeshLab by example ! http://meshlab.sourceforge.net/ (525 000 Faces --> 25 0000 faces 5 seconds)
before use the _ImportOBJ by Max Smirnov!

Here 15 seconds for import / resize result of 25 000 surfaces!
http://moiscript.weebly.com/uploads/3/9/3/8/3938813/25000_faces.zip (12 Megs)
(Waiting the max Polygon Converter for nice Nurbs surfaces :)

The noise engines looks interesting, merci Pilou!

MArc