an (not very successfull) attempt to render the happy buddha with patina. I
use a patched version of megapov with a new pattern which send a bunch of
rays, and check if they intersect an object (see the red&blue picture)
(btw, if someone have a good patina texture i m interested :)

M

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Attachments:
Download 'Buddha_pigment.JPG' (34 KB) Download 'Buddha_patina1.JPG' (43 KB)

Preview of image 'Buddha_pigment.JPG'

Preview of image 'Buddha_patina1.JPG'

Mael wrote:

> an (not very successfull) attempt to render the happy buddha with patina. I
> use a patched version of megapov with a new pattern which send a bunch of
> rays, and check if they intersect an object (see the red&blue picture)
> (btw, if someone have a good patina texture i m interested :)
>
> M
>
>  [Image]
>
>  [Image]

Hmmm... I think it's quite good. It gives the look of a badly
cleaned antique. Maybe the bump map isn't quite right...
No smooth enough but very good nonetheless...

Do you have this mesh in regular POV mesh format ?


Best,

    S.

----------------------------------------------------------
Steven Pigeon                     Ph. D. candidate
University of Montreal.
pig### [at] iroumontrealca           Topic: data compression
----------------------------------------------------------
         http://www.iro.umontreal.ca/~pigeon

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The pattern looks fine. Can it be combined with slope to
give it directinal bias?

_____________
Kari Kivisalo

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I'm impressed, very!
:o)

Mael wrote:

> an (not very successfull) attempt to render the happy buddha with patina.
> I use a patched version of megapov with a new pattern which send a bunch
> of rays, and check if they intersect an object (see the red&blue picture)
> (btw, if someone have a good patina texture i m interested :)
> 
> M

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Mael wrote:
> 
> an (not very successfull) attempt to render the happy buddha with patina. I
> use a patched version of megapov with a new pattern which send a bunch of
> rays, and check if they intersect an object (see the red&blue picture)
> (btw, if someone have a good patina texture i m interested :)
> 

Nice, i think Chris Huff was working on a similar patch too.  Does it
generate smooth transits or are there steps in the pattern value?

Christoph

-- 
Christoph Hormann <chr### [at] gmxde>
IsoWood include, radiosity tutorial, TransSkin and other 
things on: http://www.schunter.etc.tu-bs.de/~chris/

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> Nice, i think Chris Huff was working on a similar patch too.  Does it
> generate smooth transits or are there steps in the pattern value?

it should be smooth transition : you give the number of samples you want,
and the pattern return (nb_samples_hit)/(nb_samples). It uses the same
hemisphere distribution than the blur for reflection

i was thinking about adding a max_distance, so that if the ray intersect the
object too far, it does not count as an intersection.

M

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> The pattern looks fine. Can it be combined with slope to
> give it directinal bias?

i think it can be combined as all other pattern
(but you can't use it in eval_pattern/eval_pigment because it needs the
normal of the object)

M

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> Do you have this mesh in regular POV mesh format ?

i have it in mesh2. Converted from the .ply format you can find here :
http://www.cc.gatech.edu/projects/large_models/happy.html

M

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