In article <3D3### [at] skynetbe>,
 Fabien Mosen <fab### [at] skynetbe> wrote:

> Wouldn't POV-Ray itself be able to read a 48 bits PNG ?
> 
> (you render in a 48 bits PNG, you use it as an image_map
>   that fits exactly the screen, and you process it using
>   eval_pigment and reconsturct the image with colored
>   boxes)

If you really want to do image processing of a large image in the POV 
language...it will be very, very slow.

A better solution: use the image_map on a plane or box with ambient 1, 
an orthographic camera and no light sources, and the curves post_process 
filter. The raw_image filter won't be of any help here, since the data 
has already been put through a PNG file. You will lose data for color 
values >1, and will only get 16 bits per channel instead of the float 
precision the post_process filters have access to...basically, MegaPOV 
will be as limited as any other external program.

-- 
Christopher James Huff <chr### [at] maccom>
POV-Ray TAG e-mail: chr### [at] tagpovrayorg
TAG web site: http://tag.povray.org/

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