This is Vtastek's Water Shaders with a few extra normal maps included.

It is highly recommended that you back up the "water_fragment.glsl" and "water_vertex.glsl" files located
in the "resources\shaders\" directory within your Openmw installation.

This pack includes Openmw's base normal map for the water so there is no need to backup this file.

Installation
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1. copy the "water_fragment.glsl" and "water_vertex.glsl" files in this directory and paste them into 
   the resources\shaders\ directory located in your Openmw installation

2. within each folder of the "normal maps" directory is a file called "water_nm". pick the normal map you want.
   (medium ripple and low rise waves are my personal favorites)

3. copy the "water_nm" file and paste it into the "resources\shader\" directory located in your Openmw installation
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To revert the changes simply place the original 
"water_nm", "water_fragment.glsl", and "water_vertex.glsl" files into the "resources\shaders\" directory
of your Openmw installation.