Cordon Manager
The cordon manager lets you use multiple cordons and limit the compiling of your level to the area inside the cordon.
Studiomdle.exe - vstdlib.dll is missing
This is a common error that you'll get after a Steam update. The simple fix is to restart Steam and Source SDK.
Mass Model Fetch
The Mass Model Fetch Utility allows you to import multiple props into your scene at once.
My Model Scale is Wrong
All you need to know about getting your model scale correct.
Many new 3ds Max users have problems with the scale of their exported models not matching the scale in the Max UI. Here are some tips on solving that.
Brush Materials have incorrect rotation and scale when using the DirectX Shader
The Wall Worm Material Library Generator originally created DirectX Materials for all materials. But updates to the VMF Exporter changed the way materials are interpretted. Whenever possible, you should not use DirectX Materials.
Exporting Correct Smoothing on Models
Understanding Smoothing Groups and Explicit Normals
Discussion on smoothing groups and explicit normals and how they relate to Source.
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.
Unexpected Model Orientation in VMF Exporter
Fixed in WWMT 1.772
The orientation of models in the QC Generator has been flipped on the Z-axis and the VMF Exporter is also rotated to accomodate this result. You may need to recompile models compiled before the 1.772 update.