scott <sco### [at] scottcom> wrote:
> > These "reflection" numbers in pov-ref.txt file are extracted from a image,which
> > with location and reflective information for 40000 points.We call this image a
> > reflecity image in remote sensing.This image is photoed by flight.Thank you for
> > your advice.I go to have a try!Gratitudes!
>
> I must admit I don't have much experience with OpenEXR output. What
> happens if you render the below scene to OpenEXR and check the
> luminance, what values to you get for different values of "ref"? Do they
> match up?
>
> #version 3.7
> global_settings {assumed_gamma 1}
> #default{ finish{ ambient 0.0 diffuse 1.0 }}
> camera
> {
>   orthographic
>   location z
>   look_at  0
>   right    x*image_width/image_height
> }
> light_source{ <0,0,10> color rgb 1 }
> #local ref = 0.5;
> box { -1/2 1/2 pigment{ color rgb ref} }

I have another confusion:I have known the value of solar irradiance(w/m^2) from
200nm-2200nm,how can I set the solar irradiance in pov?

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