> ##################################
>
> global_settings {assumed_gamma 1.5  max_trace_level 5}
> #declare rnd1=seed(1);
>
> #declare n=900;
> #declare r1=1;
> #declare r2=5;
>
> #declare k=1; #while(k<=n)
>      #declare P=<rand(rnd1)-0.5,rand(rnd1)-0.5,0>*r2;
>      sphere{<0,0,0>,r1 pigment{rgbt 1} hollow no_shadow interior{media{emission
> 1/r1}} translate P}
> #declare k=k+1; #end
>
> camera{location<0,0,-5*r2> look_at<0,0,0>}
>
> ##################################
>
> As you see, n is the number of spheres, r1 their radius, and r2 the edge length
> of the box which contains all spheres.
>
> If I set r2 = 2 the error occurs, but for r2 = 5 (and otherwise same values)
> rendering works.
>

I have tried your code, without the media statement no error occurs, 
even if r2=2. Maybe the stuff is here.

Lionel.


-- 
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