chaps wrote:
> Hello,
> I like your testure, even if it must be quite slow to render.
> 
> I guess the problem comes from max_trace level. In your function:
> 
>>   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) }
> 
> 
> bozo and granite add real bumps on the underlying sphere, so the ray that
> are shot near the edge of the cloud may have to go through more than 5
> surfaces before hiting the sky sphere and you get a black dot. if you add
> the statement:
> 
> global_settings {
>   max_trace_level 15
> }
> 
> it should disapear. Note that 15 is an example, and it may adjust to yor
> scene and image resolution.

This advice is plain wrong. Isosurfaces themselves are not controlled by
max_trace_level, but by the trace_level/all_intersections statements.
Increasing max_trace_level has no effect whatsoever here.

	Thorsten

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