The attached is a demo showing one use of the magnet fractal pattern
from the MegaPOV patch. Turbulated rather heavily, it makes a veryy
realistic marble or agate, with alternation between fairly "straightforward"
regions and much more complex ones. This is used "straight" in the tabletop.

    The tiles in the background were done using a similar pattern and two
applications of the "repeat" warp (with a slight offset and a flip in each
case), nested within two layers of unturbulated marble (one rotated) to
superimpose the black grid.

    -Robert Dawson

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Attachments:
Download 'magtxtr.jpg' (31 KB)

Preview of image 'magtxtr.jpg'

In article <387a0180@news.povray.org>, "Robert Dawson" 
<Rob### [at] stmarysca> wrote:

>     The attached is a demo showing one use of the magnet fractal pattern
> from the MegaPOV patch. Turbulated rather heavily, it makes a veryy
> realistic marble or agate, with alternation between fairly 
> "straightforward"
> regions and much more complex ones. This is used "straight" in the 
> tabletop.

I can see possibilities for a good burled wood texture, too.

-- 
Chris Huff
e-mail: chr### [at] yahoocom
Web page: http://chrishuff.dhs.org/

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I like this one. Good job.
  Would you like to share the texture code with us?

-- 
main(i,_){for(_?--i,main(i+2,"FhhQHFIJD|FQTITFN]zRFHhhTBFHhhTBFysdB"[i]
):5;i&&_>1;printf("%s",_-70?_&1?"[]":" ":(_=0,"\n")),_/=2);} /*- Warp -*/

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Nieminen Juha <war### [at] punarastascstutfi> wrote in message
news:387b1f9b@news.povray.org...
>   Would you like to share the texture code with us?

    Sure. Should have included it yesterday.


==============================snip
snip====================================================
/*  Turbulated magnet1m marble textures demo code */

camera { location <3,6,-10> look_at <0,3,0> angle 35 }
light_source { <100,100,-40>, 0.8 area_light <15, 0, 0>, <0, 5, 5>, 5, 5}
light_source { <-50,100,-200>, 0.8 area_light <15, 0, 0>, <0, 15, >, 5, 5 }

union{
        cylinder { <0,-0.1,0><0,0.1,0>,2}
        torus{2,0.1}

/*The tabletop texture is based very closely on Nieminen Juha's original
pattern demo, but turbulated.*/
 pigment {
  magnet1m 30
  color_map { [0 rgb <1,.7,.3>][.5 rgb <.8,.4,.1>][1 rgb <1,.7,.3>] }
  fractal_exterior_type 6,.001
  fractal_interior_type 1,200
  translate <-2,-1,0> scale 10
  warp{turbulence 0.5}
 }
 normal {
  magnet1m 30 1
  slope_map { [0 <1,0>][1 <0,-1>] }
  fractal_interior_type 1,200
  translate <-2,-1,0> scale 10
  warp{turbulence 0.5}
 }
 finish { specular .5 reflection 0.05 }
 translate<0,3,0>

}

cylinder{<0,0,0>,<0,3,0>,0.2 pigment{rgb 0.8} finish{reflection 0.5 diffuse
0.5}}

plane{<0,1,0>,0 pigment{checker  color rgb<1,0,0>  color rgb 1}
finish{diffuse 0.7 ambient 0.3}} /*imaginative!*/

plane{<0,0,1>,5 pigment{     /*Bookmatched "marble" tiles*/

                  marble pigment_map{[0.03 color rgb 0.3][0.03    /* These
two lines yield the "cracks"*/
                     marble pigment_map{[0.03 color rgb 0.3][0.03

                        magnet1m 30   /*and here's the tile texture*/
          color_map { [0 rgb <0.85,0.8,0.7>][0.25 rgb 1][0.3 rgb
<0.3,0.3,0.2>][.45 rgb <1,0.9,0.8>][0.65 rgb 0.5][1 rgb 1] }
          fractal_exterior_type 6,.001
          fractal_interior_type 1,200
          translate <-1.7,-1,0> scale 10
          warp{turbulence 1.7}
          warp{repeat x offset 0.036*z flip x}
          warp{repeat y offset 0.06*z flip y}]} rotate <0,0,90>]}}
   finish{diffuse 0.7 ambient 0.3}}


    /*Enjoy! -RJMD*/

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