Random Elements
Random Elements Modifier lets you randomize position, rotation and scale of geometry or UVs at the element level.
Convert Blends and 4ways to OSL
Converting DX Blend Shaders to renderable OSL shaders.
OSL: Multi Gradient
The Multi Gradient OSL map has several gradient masking options.
OSL: Swirl
OSL Swirl is a simple texture map with a few controls on making swirl textures or swirl masks.
The Grid and Manipulation
Documents on the grid and related topics.
VBSP.exe has stopped working
VBSP can crash if there are no entities or world geometry in your scene.
Using WWMT
Articles on using the Wall Worm Model Tools.
Purging Corrupt Utility Files
Instructions on deleting corrupt utility files that can stop Wall Worm from working correctly.
Studiomdl.exe - Model has 2-dimensional geometry
Relates also to: Error with convex elements of Mesh
This error is usually caused by models having a $concave flag that do not have proper collision hulls.