Models with 2000 triangles or less and Envelopes (skinned models) with 4000 triangles or less can exported to Valve's .SMD file format.

In order to output your creations to files that Half-Life 2 can understand, you'll need to activate the .SMD exporter. Simply click below, answer a few questions, and a personal Activation key will be sent to you via email.

To activate your exporter:
-Run the SOFTIMAGE|XSI EXP for Half-Life 2
-Select 'File-->Export-->SMD File...'.
-In the 'SMD Export Options' window, click 'Ok'
-Name this file under 'File Name' and hit 'Enter'
(you can delete this dummy file later)
-You will now be prompted to enter your e-mail address and activation key.
Once this is done, click 'OK'.
-Your exporter is now permanently unlocked!

You have to have a texture assigned to your mesh in order to export
anything.

'WARNING : "3000 - WARNING : 3000 - -------- This is a demo version of mental ray --------
'
'Copyright © 1986-2002 mental images GmbH & Co. KG, Berlin, Germany.
'This demo version may be used only for evaluation, but not for commercial
'purposes. All rights reserved. It has the following built-in restrictions:
'- geometry is retessellated before every frame; triangles are not retained in memory for the next frame
'- watermark logos appear in bottom left corner
'- multithreading and network rendering is disabled
'- scene echo (-echo option) is not supported
'- restricted pass/preview rendering to a resolution of 400*300
'- renders that exceed 510*510 resolutions will exhibit artifacts
'- restricted region renders to even resolutions of up to 510*510"
'INFO : "4051 - Begin: Export to Valve format"
'ERROR : "Error - Nothing to export"
'INFO : "4052 - End: Export to Valve format"
ExportSMD