Valve to Release Source Filmmaker Machinima ToolBy Norman Chan This is legitimately exciting. In addition to finally releasing the "Meet the Pyro" Team Fortress 2 video, game developer Valve has announced that it will release its in-house machinima creation tool, Source Filmmaker. This is the same tool that Valve animators have used to create TF2, Portal, and Left4Dead promotional videos, all using in-game art assets and rendered in real-time with modern gaming PCs. SFM will initially only work with Team Fortress 2, but users are encouraged to mod the game and introduce custom characters and art.