I can not make any tutorial, just want to check your topic, and I felt interesting,
so dig up your topic. 
then I feel , this tutorial seems different what I suppose.
my first try, is just make sphere , and cut half surfaces like my img,
(in image, I set on visibility , and set pointlight for sphrere light cover
so it make mozaic shadow, but it has no means.
just because I hope some one teach us and want to him know how I tried)
I tryed to adjust shadow or some render setting, change transtaltion, sizes,,
but I make something big mistake, maybe I need atomosphere like (dust or smoke?)
then I check this tutorial, and just do it as it say.
in tutorial, it make lay shape by cone ^^; I simply surprised,,,. image2 (long hair girl with army look swimwear)
ofcourse this tutorial is good, but is there another way to simple Vlumetric light , not with products plug-in?
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I read again old tutorial for blender, then ,, yes I had make big mistake,
I need fog, water,, or some atmosphere which may make shape of lay buy refrection ,,
so what I need if I want to make fog dust, etc,, in daz studio?
I should buy some shader?
Click thumbnail to see full-size image
......as far as i know…we can make volumetric light with uber light or something like that…i still cant remember since the tutorials are all down…i hope..someone who is an experience user may shed light to this topic and give us a solution….!!