Pete Draper has made an 11-part tutorial on creating a tornado using Particle Flow in 3ds Max.
Houdini Engine for Autodesk Maya
SideFX have released Houdini Engine for Maya, with 3ds Max and Unreal versions coming soon.
Realistic Grass in 3ds Max with V-Ray - Tutorial
Michal Horba from Evermotion explains how to create grass using the V-ray displace modifier in 3ds Max.
Plasma Arcs in 3D Studio Max - Tutorial
Find out how to create a plasma arc in 3ds Max, with this two part tutorial from CG Cookie.