How to use a static cube map with water4 pro?

Performance & Profiling
1

I noticed the realtime reflections on the water4 for unity4 pro is too heavy on performance since it has to draw all the polys twice doubling my poly count.

How can I add a static cube map to the water as its reflection instead?
And isn’t that what most games do for their water?

2

Is it just too easy that no one wants to help?

3

You need to render the images for your cubemap somehow (editor script, external renderer, whatever). Then you can just create a new cubemap asset, put the images into it, and assign it to the material you want to use.