Found odd gray rectangular patches in a reflective surface when
an image map is projected on a plane behind the reflective plane.
See examples in p.b.i.under "Gray rectangles".

The following scene produces the gray gaps when the image_map
plane is enabled, but not if it is commented out. Turning bounding
off does not change it.

POV 3.5 RC3, Pentium 4 1.4Ghz, 256MB, WinME

Harolddd

//------ test scene -----
global_settings { assumed_gamma 2.2 max_trace_level 10}

#include "colors.inc"
#include "textures.inc"

camera {location <0, 10,  -500> look_at <0, 0, 0>}

// comment out this plane to remove gray rectangular gaps in refelctive
"water" surface.
// note: use your own image in place of "clouds2.png".
plane {z ,   10000.9  texture { pigment
         {image_map {png "c:\images\clouds2.png" interpolate 4 once }
             scale <2.46,0.848,0.85>
             translate <-1.2,-0.005,0> } finish {ambient 1 diffuse 0}
             scale 6000 } }

sky_sphere {pigment{ gradient y
              color_map {[0.000 0.002 color rgb<0.0,0.3,1.0>
                                      color rgb<0.0,0.3,1.0>]
                         [0.002 0.200 color rgb<0.00,0.42,0.63>
                                      color rgb<0.13,0.42,0.63>]}
             scale 2 translate -1}
             pigment {bozo turbulence 0.65 octaves 6 omega 0.7 lambda 2
               color_map {[0.0 0.1 color rgb<1.05,1.05,1.05>
                                   color rgb<0.75,0.75,0.75>]
                          [0.1 0.7 color rgb<0.75,0.75,0.75>
                                   color rgbt<1,1,1,1>]
                          [0.7 1.0 color rgbt<1,1,1,1>
                                   color rgbt<1,1,1,1>]}
             scale <0.2,0.5,0.2>}
             rotate -135*x }

plane { y, -10
   texture {
    pigment {color rgb <0.390, 0.410, 0.630> }
    finish {
       ambient 0.15
       brilliance 5
       diffuse 0.6
       metallic
       specular 0.80
       roughness 1/100
       reflection 0.65
      }
    normal {
       waves 0.05
       frequency 5000
       phase 0
       scale 3000
      }
   }
    hollow
}

  plane {y, -10
    pigment {color <0.6 ,  0.67 ,  0.67  >}}

#declare sudsTex3  = texture { Brass_Metal     }
#declare sudsTex4  = texture { Candy_Cane      }
#declare sudsTex5  = texture { Green_Glass     }
#declare sudsTex6  = texture { Bronze_Metal    }
#declare sudsTex8  = texture { Blue_Agate      }

#declare SudsObject =  julia_fractal { < 0.003 , 0.424 , 0.896 ,  0.01  >
      quaternion max_iteration 7  precision 4000
      texture { pigment { rgb <0.75, 0.7, 0.7> }
        finish {ambient 0.1 diffuse 0.6
           brilliance 6.0  reflection 0.8
           phong 0.6       phong_size 100 }}
      scale <0.8,0.65,0.36>   }

#declare Suds = union {
    object { SudsObject rotate < 57,  87, 165> scale   30.869 translate <
334.487,  223.512,  706.618> texture {sudsTex3 } }
    object { SudsObject rotate <100, 175,  13> scale    9.230 translate <
309.178,  263.750,  692.506> texture {sudsTex4 } }
    object { SudsObject rotate < 99, 151,  35> scale   74.740 translate <
513.267,  308.141,  688.792> texture {sudsTex5 } }
    object { SudsObject rotate < 68, 127,   1> scale   20.297 translate <
230.198,  250.997,  680.020> texture {sudsTex6 } }
    object { SudsObject rotate <138,  63,  81> scale    4.780 translate <
318.172,  277.237,  673.246> texture {sudsTex8 } }
    object { SudsObject rotate <140, 158,  42> scale   58.469 translate <
385.904,  288.169,  101.813> texture {sudsTex8 } }
    translate <-305.569, -230.896, -426.227>
}

object { Suds }

// Light source
light_source {  <-150, 200,  -200> color White }
light_source {  <250,  350,   -700> color LightSteelBlue }

Post a reply to this message

Looks like coincident surfaces to me:

> plane { y, -10
...
>   plane {y, -10

These two planes occupy the same exact space. POV-Ray behaves strangely in
this case (it's in the documentation). Try changing the non-transparent one
to

plane {y,-10.001

- Slime
[ http://www.slimeland.com/ ]
[ http://www.slimeland.com/images/ ]

Post a reply to this message

Thanks Slime ;-)
I should have noticed that, sloppy cut and paste of
script.

Harold

Slime <noo### [at] hotmailcom> wrote in message
news:3cd72581$1@news.povray.org...
> Looks like coincident surfaces to me:
>
> > plane { y, -10
> ...
> >   plane {y, -10
>
> These two planes occupy the same exact space. POV-Ray behaves strangely in
> this case (it's in the documentation). Try changing the non-transparent
one
> to
>
> plane {y,-10.001
>
> - Slime
> [ http://www.slimeland.com/ ]
> [ http://www.slimeland.com/images/ ]
>
>

Post a reply to this message