The XSI Add-On for Valve Source

Author: Softimage

The XSI Add-On for Valve Source includes the very same XSI plug-ins used by Valve to create Half-Life 2, and other Source engine models and 3D artwork. Add-ons are a feature that let you add customizations to XSI, including layouts, toolbars, key maps, custom commands, and more. The XSI Mod Tool requires specially prepared Add-ons, and will not operate with Add-ons intended only for XSI Foundation, Essentials or Advanced. More info can be found at the Softimage website.