Starter Kits
Source Engine level design starter kits will automate some entity setups for common level design tasks.
Hitboxes and Bone Properties
The bone tools allow you to give specific bones artbitrary surface properties, set mass bias and create hitboxes and hitbox groups.
My Material is always Transparent but I don't want it to be
Information on outputting the desired alpha settings for your materials.
VBSP Parser
Import Detail Sprites into 3ds Max
Import prop details from your VBSP files.
Collision Hulls in 3ds Max for Source
Using WWMT in 3ds Max to create your model's collision hull with the Quick Hull feature.
Imported Brush UV Scale Wrong
Fix for importing correct UVs on brushes when the source texture is not a power of 2.
Stereo Flexes
Instructions on painting stereo weights to export into DMX.
Convert Blends and 4ways to OSL
Converting DX Blend Shaders to renderable OSL shaders.
OSL Blendmodulate
OSL Blendmodulate mask to generate a mask as with a WorldVertexTransition shader in Source.