Hey Warp,

    An HDRI image is an image map that stores brightness values greater than
the typical [0,1] (it uses floating point numbers to represent [0,
infinity]). With this, you can use a HDRI environment map as a light source
to realistically light a scene by simulating the lighting coming from the
environment.

    What I'm not sure on is how POV-Ray or mlpov deals with the extended
range, when POV-Ray's lighting engine only handles the [0,1] range. The
pictures do look good though, so it seems to be working.

Regards,
George Pantazopoulos



"Warp" <war### [at] tagpovrayorg> wrote in message
news:3e0ce0a8@news.povray.org...
>   I haven't followed too closely this HDRI discussion.
>   Looking at the few pages and images posted to p.b.i I see that I haven't
> the slightest clue about what is it all about. The images look very nice,
> but I can't see what is the HDRI thing in those images.
>
>   So could someone explain exactly what is HDRI and how it affects
> rendering? If it's an algorithm to make something better, could someone
> make images where the regular way is used and the same scene with HDRI
> is used so that they can be compared side by side? If it's something
> completely new, not comparable to anything in POV-Ray, could someone
> explain how it affects the images?
>
> --
> #macro M(A,N,D,L)plane{-z,-9pigment{mandel L*9translate N color_map{[0rgb
x]
> [1rgb 9]}scale<D,D*3D>*1e3}rotate y*A*8}#end M(-3<1.206434.28623>70,7)M(
> -1<.7438.1795>1,20)M(1<.77595.13699>30,20)M(3<.75923.07145>80,99)// -
Warp -

Post a reply to this message