"Anthony D. Baye" <Sha### [at] spamnomorehotmailcom> schreef in bericht 
news:web.4ce2500a9d76459e507e8a090@news.povray.org...
> I'm working on an experimental test image, involving a differenced sphere 
> with a
> chrome texture on the inner surface, and a hole cut in one side.
>
> The sphere is surrounded by atmospheric media, and there is a light source
> inside the cavity.
>
> logic suggests that the only light effecting the media should be coming 
> from the
> hole, but the scene is a complete white-out.  It's as if the sphere is not
> containing the light source at all, but allowing the rays to pass through 
> it.
>
> Even when the hole is removed from the sphere, and the light is completely
> contained within, the scene whites out.
>
> Is this a bug, or am I missing something?
>

Try this:
- contain the media only within the sphere
- if tthe sphere and media container are scaled up, devided the scattering 
color by the same amount. ex: media container scaled 100, then do scattering 
{scattering type, scattering color/100 gamma Gamma etc....}
- always use intervals 1 (default !!)
- start with samples 10 and increase if needed

Thomas

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