Viewer Independant Env. Mapping

[Ozz]

Does anyone know of an Environment Mapping technique which is independant of the viewers movement? You see I am simulating a large area of water(an ocean http://www.opengl.org/discussion_boards/ubb/smile.gif and I want to use env. mapping to simulate the waves on a flat plane to keep polycounts low. The only type of env. mapping I have seen is updated while the viewer is moving, obviously the ocean does`nt stop moving when the viewer does, I need it to keep going! Any ideas?

[DFrey]

You can either translate the texture matrix to scroll the texture (doesn't have to be environment mapped) or you can animate the normals of the environment mapped surface.