Thanks, this one realy helped. Other thing is that color dispersion is verry
important in diamonds, and Povray supports this from v.3.5, fortunately:-)
Josef

Hirak wrote:
>Christopher James Huff wrote:
>>In article <3e22232e[at]news.povray.org>,
>> "J.Kosina \(Rebel^v^\)" <sku### [at] hotmailcom> wrote:
>>
>>> I need to simulate realistic light effects in diamond-shape structures.
>>> I see no big trouble in making the shape, but i am no sure about
>>> setting material parametres. Also I have heard that raytracing programs are
>>> not good at stuff like this.
>
>There is actually some truth to it. Diamond has a very high 'ior' (about
>2.4) which causes many internal reflections. It is like once the light ray
>enters the diamond, it stays there and only comes out after getting
>reflected many times.
>Many raytracers (including POV) decide that the light ray is lost after a
>certain number of reflections. This is why some portion of your diamond may
>look black. Of course, with POV Ray, this is no major problem. You just
>have to tell POV that you want to trace for a long time - this is done by
>(if I recall correctly) setting the 'max_trace_level' in 'global_settings'.
>Hope this helped,
>Hirak!
>

Post a reply to this message