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.
Collision Hulls
Use Wall Worm to quickly build convex collision hulls for your model.
WWMT Utilities
Some information on utilities in Wall Worm.
BSP Topics
Basic discussion of BSP, VBSP and compiling topics.
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.
Illegal Characters in Path
Solving some problems with special characters and illegal characters in filename paths.
Incorrect Rotation on World Geometry
Fixed in WWMT 1.867
In earlier versions of the VMF exporter, non-rectangular faces on geometry produce inaccurate texture rotations.
Random Elements
Random Elements Modifier lets you randomize position, rotation and scale of geometry or UVs at the element level.
The Grid and Manipulation
Documents on the grid and related topics.
Grouped Geometry is Not Supported
When exporting grouped models to SMD, the SMD exporter will fail to export your model correctly.