I did some very similar clouds to this a few months ago and had the same
initial problems, I couldn't seem to get around the fact that to get rid of
the black dots I had to up the max_trace_level global setting to something
like 40 and I also increased the media samples and intervals values (to 10
each in my case) but I think this depends on the media method type) the
resulting clouds looked good but took many hours to render, I #declared a
quick setting to allow me to do quick renders) as in ...


#declare quick=off;

media {
         #if (quick)
                intervals 2
                samples 2
         #else
                intervals 10
                samples 10
         #end

etc

Hope this helps, although if anyone can do quicker clouds like this I'd be
very interested too!

"FlaPovFan" <nomail@nomail> wrote:

> problem, but the dots cover a very small area and the problem could be
> resolved in an image-editing problem. That's not the Pov-Ray way, though.
>

> sure is bloated.  Also, any suggestions on removing the black dots.

> help the problem and really slowed down render times.  A Google search
> revealed a patch for the Linux version of Pov-Ray that was supposed to

> program.  I use the Windows version.
>
> Thanks, in advance, for any help.
>
> #include "colors.inc"
> include "functions.inc"
>
> camera {
>   location  <-14.0, 30.0, -89.0>
>   angle 111
>   look_at   <4.0, 42.0,  0.0>  right     x*image_width/image_height
>   rotate 15.5*y
>   rotate -5*x
>   rotate 3*z
> }
>
>
> light_source {0*x                  // light's position (translated below)
>   color rgb <1,1,1>    // light's color
>   translate <0, 460, -520>
> }
>
>
>
> #declare Cloud=
>
> isosurface {
>   function {(f_sphere(x/4.2+2, y/2.8-2, z/1.6-12, 3.9)*f_bozo(x*6.2,
> y*6.4-32, z*.18+16))+
>   f_granite(x/15-13, y/25-13, z/700-74)}//+f_granite(x/30, y/30, z/30) }
>
>
> contained_by {sphere {0,156.6}}
> max_gradient 100
> accuracy .00001
> threshold .4
> all_intersections
> max_trace 300
> hollow no_shadow
>
>
> texture { pigment { rgbt 1 } }
>
> interior {
>
>     media { scattering {2 .11 extinction .6 }  emission  <.005,.005,.005>
>    density {spherical
>    warp { turbulence 2.8 lambda 4 octaves 4 omega 1 }
>    density_map {
>           [0 rgb 0  ]
>           [.4 rgb .01]
>           [.7 rgb .0128]
>           [.99 rgb .0421]
>           [.995 rgb 1.0001]
>           [1 rgb .8]
>           }
>
>     turbulence 6.55
>     octaves 6
>     omega 0.7
>     lambda 2
>       color_map {
>
>           [0.0 0.1 color rgb <.6, .6, .6>*1.6
>                     color rgbt <0.85, 0.85,0.85, .35>*1.6]
>           [0.11 0.6 color Clear
>                     color rgbt <1, 1, 1, .5>*1.6]
>           [0.61 1 color Clear     // rgb <1.75, 1.75, 1.75>*1.9
>                     color rgbt <0.7,0.7,0.8,.7>]
>          }
>
> } } } }
>
>
> #object {Cloud scale <7,7,2>*.47 rotate 20*z translate 85*y translate 22*z}
>
> sky_sphere {
>     pigment {
>      wrinkles
>      scale 0.35
>     turbulence .4
>     octaves 300
>      color_map {
>             [0  color rgb <0.25, 0.25, 0.7>]
>             [1  color rgb <0.9, 0.9, 1>]
>         }
>     }
>
> }

Post a reply to this message

Attachments:
Download 'sunset.png' (418 KB)

Preview of image 'sunset.png'