Looks great either as short haired fur or velvet.
I would never have thought of using a negative IOR.
To quote Vroomfondel on this: 'I think our brains must be
to highly trained, Majikthise'
But if the POV developers allows fysically impossible
values, who am I to complain.

    Andrel

Simon Adameit wrote:

> I used an IOR of -1 together with scattering media type 5 to create this fur
> effect but I can't jugde if it is worth the rendering time compared to a fur
> texture, so what do you think?
>
>  [Image]

Post a reply to this message

If I were you, I'd market your texture as -the- definitive velvet of Povray.
This is really a great texture!

Simon Adameit wrote:

> I used an IOR of -1 together with scattering media type 5 to create this fur
> effect but I can't jugde if it is worth the rendering time compared to a fur
> texture, so what do you think?
>
>  [Image]

Post a reply to this message

On Thu, 7 Feb 2002 16:42:16 +0100, Simon Adameit wrote:
> I used an IOR of -1 together with scattering media type 5 to create this fur
> effect but I can't jugde if it is worth the rendering time compared to a fur
> texture, so what do you think?

It doesn't look like fur as such, but it's still exelent.  It's more like
velvet.  

--
sphere{z*5,1pigment{rgb.5}finish{reflection.3specular.5}}box{<-50,-3,-50>
<50,-2,50>pigment{checker/*\__\\__/  * \_\\__*/scale 2}finish{ambient.7}}
light_source/*__\\__\\__\\__\\__\(    ~ )\__\\__\\__\\__\\*/{<2,5,1>*4,1} 
/*\\__\\__\\__\\__\\__\\__\\__\\__\~  -/__\\__\\__\\__\\__\\*//* Steve */

Post a reply to this message

> effect but I can't jugde if it is worth the rendering time compared to a
fur
> texture, so what do you think?
>

If the rendering time is not above 5 minutes, I'd accept it.. Looks good,
but media is said to be too slow.

Hugo

Post a reply to this message

"Hugo" <hua### [at] post3teledk> wrote in message news:3c638db2@news.povray.org...
>

<snip>

Hmm, very different method, but very similiar to Rune's "fur" texture. His looks
like velvet too...

http://rsj.mobilixnet.dk/3d/goodies/goodies.html

Post a reply to this message

"andrel linnenbank" <a.c### [at] amcuvanl> wrote in message
news:3C62FE97.F02251B2@amc.uva.nl...
> Looks great either as short haired fur or velvet.
> I would never have thought of using a negative IOR.
<snip>
> But if the POV developers allows fysically impossible
> values, who am I to complain.

I don't know a link to any info, but I remember reading about some highly
ionised gas, plasma, or similar, etc that had a negative index of
refraction. I'll look into it. As another interesting point, I read a few
weeks ago about a reasearch group who had found a material with such high
IOR properties that it actually stopped the light dead - ie reduced it
velocity to zero and suspended the photons in a gas - which makes it very
useful for optical computers.

Jim

Post a reply to this message

here are some links for negative IOR and 'slow' light

http://physicsweb.org/article/world/14/9/12  -IOR

http://physicsweb.org/article/world/14/9/8 - slow light

Jim

Post a reply to this message

Sponge like or soft rubber covered by the mouse pad covering material...??

Simon Adameit wrote:

> I used an IOR of -1 together with scattering media type 5 to create this fur
> effect but I can't jugde if it is worth the rendering time compared to a fur
> texture, so what do you think?
>
>  [Image]

Post a reply to this message

"Simon Adameit" <gom### [at] gmxde> wrote:

> I used an IOR of -1 together with scattering media type 5 to create this fur
> effect but I can't jugde if it is worth the rendering time compared to a fur
> texture, so what do you think?

Very nice image, but could you please post the complete source for
this scene?

Thanks
Sven

Post a reply to this message

Yes, please!

I'll render it on a falling piece of fabric that i've got here. (It's
triangle mesh but it should be possible.)

Post a reply to this message