https://developer.valvesoftware.com/wik ... ure_FormatThe Valve Texture Format (VTF) is the proprietary texture format used by the Source engine.
It would be convenient if XnViewMP could handle this too, so I don't need to view .vtf files in VTFEdit.
You could use the LGPL licensed VTFLib for decoding: http://nemesis.thewavelength.net/index.php?c=177#p177
It will need some work to compile on Mac and Linux though.
There's a Qt plugin for it depending on a Linux-compatible port: https://github.com/panzi/qvtf
Requiring -> https://github.com/panzi/VTFLib