There is only one file type that uses the .NVV extension:
NVIDIA Vertex Shader File
File created by NVIDIA Graphics SDK, a graphics development program; contains special effects attributed to objects in a 3D graphics scene such as color, texture, and lighting characteristics; also contains data variables that determine each vertex, which is associated with x, y, and z coordinates that define their location.
NOTE: The compiled version of the NVV file is the .VSO file.
|NVIDIA Graphics SDK||Free|
Updated: March 25, 2014