Hey Tradivoro....First let me say I had a brain fart when trying to explain this...What I mean is I did leave somthing out. Set your sky to simple gray backround. I noticed in your image that your conical light seemed pretty solid. Make sure that your light is set to lit rays. Also you need to remove the ground plane, I forgot to say that before. Sorry for any confusion. If this doesn't help let me know, I can email you the B5 file it is pretty small. When I did this pic I was trying to get the rays to shine through the water. The camera was originally in the Directors view. So this was really just a cool accident. Included are three captures one is the top view of my scene second is the Light Lab, and last is the material used. Hope this helps.