An update has been released for the Source SDK, and will be downloaded automatically when the steam client is restarted. The update enhances the SDK, and fixes various bugs.

Enhancements

• Added a drop-down list in the SDK Launcher that allows the user to switch between The Orange Box engine and the Half-Life 2: Episode One engine
• Two new lighting preview modes are available in Hammer
• Models are automatically centered when loaded in Faceposer

Bug Fixes

• Fixed crash and corrupt configurations for users that don’t own any Orange Box games
• Resolved issues with building models for any games that that use the Half-Life 2:Episode 1 engine
• Fixed crashes in Hammer and Faceposer when HL2 is set to the active game

Known Issues

• Cannot create shortcuts to Hammer, Faceposer, and Model Viewer
• Linux makefiles for the Orange Box source code are incomplete and will be updated in the next release
• The Particle Editor is not presently included in the Source SDK
• SDK shader code only included with mods built to use Half-Life 2:Episode 1