Water reflection.


I need help with how to reflect the space, atmosphere, clouds, sun and the moon on the water surface. See picture: http://oi58.tinypic.com/2vvm2p5.jpg

The easy way to say it in: How do I reflect the day/night cycle on the water surface when using sphere/hemisphere and a plane for the whole sky?

I’m using OpenGL 3.3 and GLSL 3.30.

Thanks in advance!