Does any one know how to make a good under water effect such as found in this image. http://hof.povray.org/guardian.html This was rendered with Pov ray so you should be able to get that effect with Pov ray and blender. Thanks for your help.
Ok if you want to know how to make water, see the extras on finding nemo. That movie was made by the masters. Though I have been wanting to know how to do that in blender myself.
make a displaced water plane, set some mist, volumetric spots ahead the plane …
add a ground …
if the water is not so deep you are maybe interested in some light effects on the ground:
http://blenderartists.org/forum/showthread.php?t=95057