clipka <ano### [at] anonymousorg> wrote:
> Am 07.08.2011 10:24, schrieb kiwon:
> > is there any person who has an experience to render some kinds of wet materials
> > such as cloth, sponge, etc? I read a SIGGRAPH paper:
> > http://graphics.cs.kuleuven.be/publications/PFPBFS/PorousFlow.pdf
> >
> > This paper says that they used POV-Ray for rendering, but not so much in detail.
> > How can I use POV-Ray to render these kinds of materials? Would you please give
> > me some idea or tip? :)
>
> According to the paper they just changed the pigment to make it darker;
> I'd guess they used a DF3 file, but a UV-mapped approach might be
> possible as well.

I also can generate the DF3 file which contains the saturation level data; it
varies from 0 (dry) to 1 (fully saturated), actually, the value 1 must be
0xFFFFFFFF in real binary data as the document says. Since the DF3 data covers
<0,0,0> to <1,1,1>, I also matched it with the target object. For the test, box
is just fine now.

Then, how I can use the DF3 file relevantly for my intention? My first hack is
like:
object {
  box {<0, 0, 0>, <1, 1, 1>
    translate <-0.5, -0.5, -0.5>
    scale 0.9
    translate <0.5, 0.5, 0.5>
  }
  material {
    texture {
      pigment_pattern {density_file df3 "saturation.df3" interpolate 1}
      texture_map {
        [0 T_Dry]
        [1 T_Wet]
      }
    }
  }
}
Enough? or any advice?

--
Kiwon Um

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