Well Known CG /FX Artist Pete Drapper just updated his youtube channel posting a bunch of really nice tutorial on 3Dsmax including techniques and tips on procedural modeling  with modifiers, ligthning and rendering with MentalRay and also some specials advanced tutorial with Pflow. Below a special selections of his nice tutorials. For more check out his youtube channel:

Natural Wire Wrapping


Lava Blobs – Procedural Modeling


Air Plane Contrails with Pflow


Recovering corrupted scene data