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

[youtube]http://www.youtube.com/watch?v=dAIrlxPUnqM&feature=plcp[/youtube]

Lava Blobs – Procedural Modeling

[youtube]http://www.youtube.com/watch?v=3T0NwL_N-sA&feature=plcp[/youtube]

Air Plane Contrails with Pflow

[youtube]http://www.youtube.com/watch?v=dEp9fcHffTo&feature=plcp[/youtube]

Recovering corrupted scene data

[youtube]http://www.youtube.com/watch?v=q3wK90mSi3I&feature=plcp[/youtube]