List of essential Source modding tools for creating SFM addons. github.com/Gira-X/VMT-Editor - Basic vmt editor that comes with a VTF batch script and more, very useful. steamreview.org/BlenderSourceToo… - Blender addon that converts your models to Valve SMD and DMX files and vice versa. github.com/REDxEYE/SourceIO - Blender addon that also converts models to SMD and DMX files. steamcommunity.com/groups/Crowba… - Multipurpose tool you should already have, includes model decompiler/compiler, model viewer, packer, etc. nemstools.github.io/pages/GCFSca… - OPTIONAL Opens VPK and GCF files found in other Source 1 games wunderboy.org/valve-hl2source-sd… - OPTIONAL Allows you to view VTF file thumbnails without VTFEdit cdn.discordapp.com/attachments/6… - basic .qc file to use as a reference.