[Dornep]

Take a look at this conf.ini guide over at M4T and it should tell you everything you need to know about water settings.

OpenGL Conf.ini Guide
http://mission4today.com/index.php?name=...how&kid=27

Water=1
To select water rendering mode please modify the Water section in the file conf.ini in the [Render_OpenGL] section (Water = 1 by default).

Water = 0 - Water with flat geometry (fastest).

Water = 1 - Water with flat geometry (fast).

Water = 2 - This mode is visually similar to water = 3 but it runs on ATI cards 9800, X800, X1800 and later models.

Water = 3 - Fast render mode with Vertex Shaders 3.0 (NVIDIA 6600 and later models)

Water = 4 - Better quality mode with Vertex Shaders 3.0 (NVIDIA 6800 and later models)

Reminder:
ATI 9500 and higher supports modes: 0, 1, 2.
NVIDIA 6600 and later models support: 0, 1, 2, 3, 4.
NVIDIA cards before the 6xxx series support: 0, 1, 2 (2 is not recommended).