"Jim Holsenback" <jho### [at] hotmailcom> wrote:
> "alphaQuad" <alp### [at] earthlinknet> wrote in message
> news:web.4881fcd12dc5bc4e68c5136d0@news.povray.org...
> >I wonder if another program, not POV, was used here:
> > http://www.imagico.de/pov/meta/block_neg.jpg
> >
> >
> > Lighting this scene for shadows inside this media filled sphere presents a
> > number of problems.
>
> yes I've seen this as well .... I wanted to throw some light (is there a pun
> there?) onto the target so I added another light source (media_interaction
> off) then included it in a light_group with the target as the lone member of
> that light_group (global_lights off). the target just has pigment no finish
> block (reflection is 0 unless otherwise specified right?) yet it looks like
> light is indeed making it off the target enough to fire up the media. the
> light_group light source is parallel and has point_at set to the center of
> the target. pardon the spotty nature of the media, I have samples reduced by
> a factor of ten while testing, otherwise it takes about an hour for each
> test.
>
> a difficult lighting challenge indeed.
>
> Jim

"a difficult lighting challenge indeed" ONLY when you cant think of what to do,
as was my case. I saw "media_interaction off", doh! Seen it before but didnt
think of it. this one in only 20 minutes, no AA.

code available if anyone has computer muscle and wants to play.

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