Studiomdl.exe - Check for write enable
This error occurs when the path for the output model does not exist. This is an error that happens at the compile stage and will happen if you are compiling straight from WWMT or by compiling manually from the batch file.
Displacement Texture Scale Sometimes Incorrect
Understanding Displacement Blend Texture Scale
This page explains one cause for displacement materials to be scaled incorrectly in Source as well as the solution. You should use bitmaps of equal dimensions in both materials controlling the Blend material.
Advanced Bone Settings
Information on adding bones to your model or controlling advanced parameters.
Studiomdl.exe and Vtex.exe - Unable to find gameinfo.txt
This error usually indicates Steam did an update or you are working with a mod that doesn't use the Steam VProject setting. Read the fix here.
Vtex.exe - ERROR: Can't convert image from RGBA8888 to DXT1 in CalcLowResImage
This error occurs if you are trying to compile an image that has a dimension that isn't a Power of 2.
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.
Source Tools
Modeling Resources for the Source Game Engine. Links to helpful tools, sites and resources.
OSL: Lightmapped_4Wayblend
The Lightmapped_4Wayblend OSL map allows you to render 4way blends for props.
Wall Worm Turns Five Years Old
Wall Worm launched on November 18, 2010. This post discusses the journey from then through November 2015.