Hull Helper
Hull Helper is a simple UI to speed up making hulls from complex models.
Stereo Flexes
Instructions on painting stereo weights to export into DMX.
Convert Scene to Model
Instructions on converting a scene into a model or clustering multiple model props into single models.
Creating Entities
Details on what objects automatically export as entities in a VMF and how to manually create other entities.
Generating LODs
The Level of Detail Generator on the Level of Detail Tools Rollout lets you generate LOD models from the root mesh. The tool will make lower-res versions of your model so that less polygons are rendered in-game when players move farther away.
Export Body Groups | $bodygroup
You can export body groups ($bodygroups) directly into Source in 3ds Max.
Sky Writer
Sky writer allows you to render your 3ds Max scene straight into the Source Game Engine as a HDR 2D sky texture (also known as a cubemap).
Converting Displacements to Models
Steps on converting a collection of displacements to props.