Export Multiple Texture Skins
You can give your model multiple skins (textures) so that the same mesh can look differently in different uses.
VMAP Exporter
The Wall Worm Level Exporter can export 3ds Max scenes into Source 2 VMAP files.
Level Design
An introduction into level design for Source using 3ds Max.
Your 2D Sky and Sky Writer
Overview of setting up a scene in 3ds Max to render out as a 2D sky for your level with Sky Writer.
Advanced Bone Settings
Information on adding bones to your model or controlling advanced parameters.
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.