Wall Worm is a script and tool developer focused on 3ds Max and various Max-related pipelines. Historically, Wall Worm was devoted soley to optimizing the Source Engine asset pipeline. The Wall Worm toolset itself is a Source-only toolset. However, many new tools are generic in nature (for any game engine, VFX, VIZ, etc), such as the CorVex plugin and most other new tools.
See the official Autodesk blog feature about Wall Worm developer Shawn Olson, Wall Worm and Black Mesa: From Black Sheep to Black Mesa and Beyond.
Wall Worm tools allow you to create assets for Source in a way that was not possible before. You can build models, textures and levels inside one environment (3ds Max) and compile them straight into Source. Wall Worm tools have been used in the pipelines of many games including Dear Esther, Black Mesa and by designers of CS:GO Operation maps and many more.
Wall Worm works in collaboration with other 3ds Max/Source developers to help enhance all the tools available to designers and mod teams.
Exporting CAT and Biped Models
Export your CAT or Biped rig from 3ds Max into the Source Game Engine with Wall Worm.
You can use Wall Worm to import a VMF into 3ds Max. This allows you to bring in your Hammer project into 3ds Max.
How to export your model textures from 3ds Max to Source.
Collision Hulls in 3ds Max for Source
Using WWMT in 3ds Max to create your model's collision hull with the Quick Hull feature.
Exporting Your Static Prop
Basic explanation on using WWMT to export your static prop into Source.
Preparing Your Model
Preparing your model to export your model with WWMT in 3ds Max to the Source Engine.
Articles on using the Wall Worm Model Tools.
Global Settings and Configuration
This floater controls some of the ways that WWMT works in general. Things you set here will be set for the current Windows User's account for all following sessions running WWMT.
Prop Data & Gibs Rollout
This rollout lets you assign prop_data values to your prop so that it can be used as a prop_physics in Source. YOu can also assign custom Gibs models with this rollout.
The utulities rollout contains various features, functions and utilities to help work with WWMT models.
This rollout contains lighting controls and other miscellaneous controls that are either rarely used or are experimental.
Attachments & Particle System UI
Attachments are points on your model where you can attach extra models and particle systems (guns, sprites, etc). This page details both Attachments and Particle Systems since the Particle System controls are also in the attachment rollout.