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From: Jaime Vives Piqueres
Subject: Experimental tonemapping tests
Date: 11 Apr 2016 11:02:52
Message: <570bbc9c@news.povray.org>
First the original (a simple hourglass I had lying around).

--
jaime


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hourglass-01.jpg


 

From: Jaime Vives Piqueres
Subject: Re: Experimental tonemapping tests
Date: 11 Apr 2016 11:03:42
Message: <570bbcce@news.povray.org>
Vignetting + Noise:

   #declare vignetting_amount=0.3;
   #declare noise_amount=0.05;
   #declare f_vignette=
   function{
     pigment{
       spherical
       color_map{
         [vignetting_amount rgb 0]
         [1 rgb 1]
       }
     }
   }
   tonemapping {
     parameters { channel,x,y }
     function(c,x,y) 
{c*f_vignette(x-.5,y-.5,0).gray-f_granite(.1+x*image_width,y*image_width,0)*noise_amount+f_granite(.2+x*image_width,y*image_width,0)*noise_amount}
   }

--
jaime


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hourglass-02-tonemapping-vignetting+noise.jpg


 

From: Jaime Vives Piqueres
Subject: Re: Experimental tonemapping tests
Date: 11 Apr 2016 11:04:49
Message: <570bbd11@news.povray.org>
Sepia:

   #declare sepia_amount=0.7;
   tonemapping {
     parameters { red,green,blue}
     function(r,g,b,x,y) 
{r*(1-sepia_amount)+min(1,r*(.393/2.2)+g*(.769/2.2)+b*.189)*sepia_amount}
     function(r,g,b,x,y) 
{g*(1-sepia_amount)+min(1,r*(.349/2.2)+g*(.686/2.2)+b*.168)*sepia_amount}
     function(r,g,b,x,y) 
{b*(1-sepia_amount)+min(1,r*(.272/2.2)+g*(.534/2.2)+b*.131)*sepia_amount}
   }

--
jaime


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hourglass-02-tonemapping-sepia.jpg


 

From: Jaime Vives Piqueres
Subject: Re: Experimental tonemapping tests
Date: 11 Apr 2016 11:05:59
Message: <570bbd57@news.povray.org>
Threshold:

   #declare threshold_amount=.1;
   tonemapping {
     parameters {gray}
     function(gr) {select(-threshold_amount+gr,0,1)}
   }

--
jaime


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hourglass-02-tonemapping-threshold.jpg


 

From: Paolo Gibellini
Subject: Re: Experimental tonemapping tests
Date: 11 Apr 2016 13:10:06
Message: <570bda6e$1@news.povray.org>
Jaime Vives Piqueres wrote on 11/04/2016 17.02:
> First the original (a simple hourglass I had lying around).
>
> --
> jaime

:-o
Great results!
Paolo


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From: Jaime Vives Piqueres
Subject: Re: Experimental tonemapping tests
Date: 11 Apr 2016 16:26:05
Message: <570c085d@news.povray.org>
Old film via image_map:

   #declare vintage_amount=0.9;
   #declare f_old_film=
   function{
     pigment{
       image_map{jpeg "old-film"}
     }
   }
   tonemapping{
     parameters{red,green,blue,x,y}
 
function(r,g,b,x,y){r*(1-vintage_amount)+r*f_old_film(x,y,0).red*vintage_amount}
 
function(r,g,b,x,y){g*(1-vintage_amount)+g*f_old_film(x,y,0).green*vintage_amount}
 
function(r,g,b,x,y){b*(1-vintage_amount)+b*f_old_film(x,y,0).blue*vintage_amount}
   }

--
jaime


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Download 'hourglass-02-tonemapping-old-film-img2.jpg' (93 KB)

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hourglass-02-tonemapping-old-film-img2.jpg


 

From: Jaime Vives Piqueres
Subject: Re: Experimental tonemapping tests
Date: 11 Apr 2016 16:27:45
Message: <570c08c1$1@news.povray.org>
El 11/04/16 a las 19:10, Paolo Gibellini escribió:
> :-o
> Great results!

   Thanks, but you should thank clipka for such a great feature...

--
jaime


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From: clipka
Subject: Re: Experimental tonemapping tests
Date: 11 Apr 2016 16:34:51
Message: <570c0a6b$1@news.povray.org>
Am 11.04.2016 um 22:26 schrieb Jaime Vives Piqueres:
> Old film via image_map:

Now *this* is seriously awesome!


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From: clipka
Subject: Re: Experimental tonemapping tests
Date: 11 Apr 2016 16:54:10
Message: <570c0ef2$1@news.povray.org>
Am 11.04.2016 um 22:27 schrieb Jaime Vives Piqueres:
> El 11/04/16 a las 19:10, Paolo Gibellini escribió:
>> :-o
>> Great results!
> 
>   Thanks, but you should thank clipka for such a great feature...

Let the art connaisseur praise the artist, and leave it up to the artist
to praise the brushmaker.

Everyone have fun & enjoy!


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From: Stephen
Subject: Re: Experimental tonemapping tests
Date: 11 Apr 2016 17:15:17
Message: <570c13e5$1@news.povray.org>
On 4/11/2016 9:34 PM, clipka wrote:
> Am 11.04.2016 um 22:26 schrieb Jaime Vives Piqueres:
>> Old film via image_map:
>
> Now *this* is seriously awesome!
>
It is indeed. :)

-- 

Regards
     Stephen


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