
Wall Worm tools creator and fellow Interloper Shawn Olson has released two fantastic new plugins, one to aid in custom detail sprite creation and the other lets you quickly block out environments in 3ds max.
Detailer is set of primitives and tools for creating billboards and detail objects. The plugin allows you to quickly create complex foliage and model scattering with rules that match those in the Source Game Engine. This plugin is for 3ds Max and is intended to be used with Wall Worm.
CorVex is a geometry plugin for 3ds Max aimed at quickly building game level layout. It offers convenient planar mapping controls for geometry that is controlled by spline bases.
Check it out Detailer here and Corvex here.