LATEST UPDATE: Version 1.3.10 on Mar 27th, 2018
This is an open source vmt editor that aims to improve the tedious experience of editing text files with an easy to use UI and fast workflow.
Dima Butemann did most of the heavy lifting involving the programming while I took care of the UI and bothered him about updating it.
It has texture previews, can convert jpgs, pngs or tgas to vtfs (and move them to proper directories), verify vmts, features a batch vmt creation and has support for (most of) new parameters introduced in Nuke CS:GO update.
Version 1.3.8 with all the required files can be found here: DOWNLOAD
Alternatively, if any of you know Qt and C++ and would like to help with the project, you can check out our git repo at https://github.com/Gira-X/VMT-Editor
Here is a quick video to demonstrate how fast making vmt files is:
And converting textures to vtf:
If it doesn't find any games you have to manually add them in the Manage games dialog:
And browse to the main game directory:
Please keep in mind that it is still in beta so some bugs may occur. Some parameters may not parse properly so refresh the vmt preview before saving to see if there were any issues. If you find any bugs you can post them here.
Also a shoutout to the creators of VTFLib (http://nemesis.thewavelength.net/) that provides the texture converting and preview functionality.