Face Gen is not available for Linux but there are plenty of alternatives that runs on Linux with similar functionality. The best Linux alternative is Blender, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 25 alternatives to Face Gen and 11 are available for Linux so hopefully you can find a suitable replacement. Other interesting Linux alternatives to Face Gen are MakeHuman (Free, Open Source), Bforartists (Free, Open Source), MODO (Paid) and Autodesk Mudbox (Paid).
MakeHuman is an interactive modelling tool for creating realistic 3D human characters. These models can be exported to several computer graphics and animation platforms including Blender, Unity 3D, Unreal Engine, OpenSim and Second Life.
Dead Deer is a 3D modeler, 3D game maker, and a 3D demo maker designed to create games. The scripting language allows you to code interactions in pseudo-C with the animation and synthesizes your rendering with your shaders.
picoCAD is a program to build and texture lowpoly 3D models. Programs for modelling are overly complicated, picoCAD aims to make it fun, easy, and accessible by focusing on the bare essentials. This program was made using pico 8.