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Just showing to someone how to make gold. This what I achivede in this
version is more like some bright yellow metal, but I like the scene in
general (nice warm coloros imho) so I'm posting it.
It took 6 h to render, using 1 M photons, and 100 samples radiosity (with
is NOT enought as we can nitice some radiosity errors undre "Raf256.com"
and under ring - in shadow).
What do You think? Any opinions are realy welcome :)
--
#macro g(U,V)(.4*abs(sin(9*sqrt(pow(x-U,2)+pow(y-V,2))))*pow(1-min(1,(sqrt(
pow(x-U,2)+pow(y-V,2))*.3)),2)+.9)#end#macro p(c)#if(c>1)#local l=mod(c,100
);g(2*div(l,10)-8,2*mod(l,10)-8)*p(div(c,100))#else 1#end#end light_source{
y 2}sphere{z*20 9pigment{function{p(26252423)*p(36455644)*p(66656463)}}}//M
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Attachments:
Download 'gold001_h.jpg' (146 KB)
Preview of image 'gold001_h.jpg'
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Not luster-y enough.
Your sponge looks like it's made out of children's candies.
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"Rafal 'Raf256' Maj" <spa### [at] raf256 com> wrote in message
news:Xns### [at] 204213191226...
> What do You think? Any opinions are realy welcome :)
Very very yellow for gold. Too yellow. If you want an 18 carat
colour, think of the make-up of that gold. 18 carat gold is 750 parts
to a 1000 pure gold, (which is an orangey colour), and the rest is
made up of either silver for yellow gold, or copper for rose/red gold.
If you want a 9 carat colour, it's 375 parts to a 1000 pure gold.
~Steve~
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"St." <dot### [at] dotcom> wrote in message news:3f141de8@news.povray.org...
>
> "Rafal 'Raf256' Maj" <spa### [at] raf256com> wrote in message
> news:Xns### [at] 204213191226...
The golds in metals.inc have reflection colours a little less saturated than
pigment colours. Is this physically correct? Is it necessary nowadays, with
metallic reflection?
Luke
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"Luke" <Luk### [at] hotmailcom> wrote in message
news:3f14334f@news.povray.org...
>
> "St." <dot### [at] dotcom> wrote in message
news:3f141de8@news.povray.org...
> >
> > "Rafal 'Raf256' Maj" <spa### [at] raf256com> wrote in message
> > news:Xns### [at] 204213191226...
>
> The golds in metals.inc have reflection colours a little less
saturated than
> pigment colours. Is this physically correct?
I'm no expert with this, but I would say so, yes, as a standard for
PoV-Ray, if that's what you mean. With gold, you really want the
colour to come first before anything else. Most people recognise the
difference between a low carat gold and a high carat gold by it's
colour. I would also say that even though gold can hold a fantastic
reflective polish, not all manufacturing jewellers polish 9ct gold in
the same way, and in some cases, manufacturers will use different
finishes on their jewellery like a matte finish when using the
sand-blasting technique, etc. Same colour gold, different finish.
> Is it necessary nowadays, with metallic reflection?
Not quite sure what you mean by this. Is it necessary in general,
or by using PoV? The answer to both, I would say is yes.
If you missed it the first time, take a look at one of my last
efforts below. I think I've got fairly close to the 18ct yellow gold
colour that I'm happy with, but it could do with a touch more ambient
imo.
http://news.povray.org/povray.binaries.images/30860/219606/H-D.jpg
~Steve~
> Luke
>
>
>
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