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.
Making Your Sky
Series on making your 2D Sky and 3D Skybox in 3ds Max for the Source Engine.
Making your 3D Skybox
Explanation on making a 3D Skybox in 3ds Max with Wall Worm.
Models and QC
Information on exporting models and QC files.
OSL Blendmodulate
OSL Blendmodulate mask to generate a mask as with a WorldVertexTransition shader in Source.
Archive of Wall Worm Version 2 Changelog
Archive of Changelog 2014 to early 2017
Archive of Wall Worm Version 2.X changelog in 2014 through early 2017.
Random Elements
Random Elements Modifier lets you randomize position, rotation and scale of geometry or UVs at the element level.
Using Props in Your Scene
Article on re-using existing props in a scene.