In article <39062a35@news.povray.org>, "Bob Hughes" 
<per### [at] aolcom?subject=PoV-News:> wrote:

> Using a low enough filter value along with a little transmit can do 
> okay along with the normal (I almost always use granite for that) so 
> long as the pigment color is white enough.  Can even go over rgb 1 as 
> in rgbft <1.5,1.5,1.5,0.25,0.125> for example. Then of course for the 
> normal to do it's stuff you need a ior and specular highlight. You'll 
> certainly find that things will change dramatically when the camera 
> and/or light are moved. So it can often be a case of adjusting for 
> one viewpoint.

I did this a while ago, I posted some images to povray.binaries.images. 
While I used a blurred transparency patch, the same thing could be done 
with finely scaled normals.
I used a white pigment with about half transparency, ambient 0, some 
reflection, and a diffuse value which added up with reflection to equal 
1.(I usually try to design my textures so diffuse+ambient+reflection <= 
1) I also added double_illuminate, so the glass is lit on both sides.(of 
course, the last one requires MegaPOV)

Media should also work, I don't see why it would be "prone to failure". 
It could be hard to adjust though...and probably slower than any other 
option(unless you use MegaPOV and media method 2 or 3).

-- 
Christopher James Huff - Personal e-mail: chr### [at] yahoocom
TAG(Technical Assistance Group) e-mail: chr### [at] tagpovrayorg
Personal Web page: http://chrishuff.dhs.org/
TAG Web page: http://tag.povray.org/

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