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Half-Life Model Viewer++ is a community-made modification of Half-Life Model Viewer for Source that provides an updated, feature-rich version of the model viewer. HLMV++ is made by ficool2, the same programmer that created Hammer++, and the two are cross-compatible. HLMV++ contains many fixes to long-standing HLMV issues, as well as many new features, some of which were ported over from Counter-Strike: Global Offensive's HLMV.

HLMV++ currently supports the following branches of the Source Engine:

• Team Fortress 2
  • Various Team Fortress 2 Source mods such as Team Fortress 2 Classic, Pre-Fortress 2 and Open Fortress can make use of the Team Fortress 2 build by following the steps outlined in this guide. This will no longer be necessary once the Source 2013 Multiplayer build is released.
• Left 4 Dead 2
• Garry's Mod

Support for other engines/branches is planned. Current new builds being worked on may include:

• Portal 2
• Source 2013 Multiplayer

Features

Note:A full list of all features and fixes can be found on the Version History article on the HLMV++ Github Wiki.

• Mvscript support, ported from CS:GO's HLMV.
• Live VMT materials editing, ported from CS:GO's HLMV.
• Ability to change picmip, antialias and anistropic settings without needing to modify the dxsupport.cfg file to do so. Options are now available via the Render tab of the control panel.
• Loading and rendering particle effects that can be attached to bones via the new Particles tab on the control panel.
• Showing/hiding the bottom-third control panel.
  • Options > Show/Hide Control Panel
• Added support for loading 2D skyboxes as the background of the 3D render area. (only in )
• Added support for Refract materials. (only in )
• Asset mounting from mount.cfg. (only in )
• A reworked Flexes control panel with pagination.
  • This feature also reworks how the Flexes panel functions, removing the usage of dropdown boxes which subsequently fixes an age-old bug where changing a targeted flex via a dropdown could sometimes revert all the flex changes you had made up to that point.
• Facial flex saving via registry keys/mvscripts.
• Saving a screenshot with or without an automatically generated alpha channel.
  • When saving a transparent screenshot of a model with an attached particle effect, the automatic generation of the alpha channel will fail to properly capture anything that uses $additive materials. This is due to the specific algorithm used to generate the screenshot.
  • Another minor issue with transparent screenshots is that there will usually always be a couple pixels in the bottom-right hand corner of the image that will need to be manually erased.
  • Screenshots (and video frames) were initially saved as TGAs until the Garry's Mod build and Version 6 of the Team Fortress 2 build, where they are now saved as PNGs.
• A new Make Video option that exports multiple PNG frames to create animated GIFs/APNGs/VTFs.
• Added volume slider for sounds.
• Added aspect ratio correction.
  • This makes the model render correctly regardless of window size. Can be toggled off for old behavior.
• Added SetCameraFOV and SetCameraAspectCorrection commands to .mvscripts.
• A new cosmetic item model browser that parses the contents of the items_game.txt file. (only in )
• Ability to create and place up to 4 different independent light sources and customize each light source's type (point, directional or spot), cone, color and ambient color. (only in )
  • Lights feature was intended for the Left 4 Dead 2 build as well, but the Left 4 Dead engine branch doesn't seem to be able to support more than 2 light sources without causing HLMV++ to crash.
  • Lights can also be set up and saved via mvscripts.

Bugs

• There seem to be no bugs yet

Fixes

Version 1

• TBA

Version 2

• TBA

Version 3

• TBA

Version 4

• TBA

Version 5

• Fixed .mdls/.mvscripts passed on command line not working. This fixes HLMV++ not working with the "Preview" mode from Crowbar.
• Fixed sounds not playing.
• Fixed crash in BoneWeights view.
• Fixed Reset Lighting also resetting background color.
• Fixed particles not being saved across sessions.

Version 6

• TBA

Screenshots

• 

  GUI

External links

• HLMV++ - official GitHub repository and binary download
• HLMV++ - official GameBanana download
• HLMV++ Twitter
• HLMV++ Discord