> I am experiencing some weird artifacts with radiosity, namely black blotches. I
> know this is a pretty standard problem, but all solutions I found recommend
> changing the error bound etc which I think I've done correctly yet I still get
> the artifacts. I am using povray 3.7.
Scenes using emissive objects as illumination source are always delicate 
to configure.
>
>
>

Try this:

#version 3.7;

//#include "rad_def.inc"
global_settings { assumed_gamma 1
	radiosity {
     pretrace_start 0.08
     pretrace_end   0.005
     count 10000 990000
     error_bound 0.3
     recursion_limit 1
     nearest_count 20 3
   }}

#default{radiosity{importance 75/10000}}
// count will tend, on average, toward 75 for most of your scene.

#include "colors.inc"    // The include files contain

camera {
location < -100,240,-20>
look_at  <0.0,20,0>


}
sphere{<100,100,0> 20 finish{emission 10} pigment{White} 
radiosity{importance 1}}
// VERY high sampling of your emissive sphere
/*
importance set to allow adaptive sampling.
This allow you to set count to some very large values and keep rendering 
speed acceptable
by having most of your scenes objects to have more reasonable sampling

*/
plane {
         <0, 1, 0>, -3

         pigment{color <1,1,1>}
         finish { reflection {0.0} ambient 0.0 diffuse 10 specular 0 }


}



Alain

Post a reply to this message