Convert vta to stl

What is the difference between .vta and .stl?

Description: Valve Face Flex (VTA) is a file type used for creating and editing Valve face textures in Valve Studio, a software package developed by Valve Corporation. It is a proprietary binary format used to store and manipulate Valve's face textures. The format contains data about the size, shape, and other attributes of the textures, as well as the actual image data.; Stl is the standard 3D data transmission file format mainly used for 3D printing. STL contains surface geometry descriptions of 3D objects and it uses a series of triangles to describe the surface geometry of a 3D model.