"Bill Pragnell" <bil### [at] hotmailcom> schreef in bericht 
news:web.4534a24ad0051878731f01d10@news.povray.org...
> Thanks for the comments, everyone!
>
> There seems to be a consensus for making her transparent... this in fact 
> was
> my original intention, but there were two problems. Firstly, other bits of
> her become visible, making her more confusing visually and swamping the
> background objects. Secondly, when transparent she exhibits severe media
> artifacts in the form of saturated pixels, which I have been unable to
> remove.
>
> Having thought about it, the main reason people expect ghosts to be 
> slightly
> transparent (but only to background objects, not themselves) is just 
> because
> that's the cheapest and easiest way to achieve it with movie/TV special
> effects. I can see no way to do it with POV-Ray that doesn't involve 
> fairly
> nasty hacks or post-production (illegal for the IRTC). So I shan't lose 
> any
> sleep over it! :-)
>

Ah yes, I remember now the transparency problems you showed us earlier. 
Forgot about them.
Interesting idea about ghost transparency, by the way. I don't remember how 
Professor Challenger saw the ectoplasms in The Lands of Mists, by Conan 
Doyle... who based himself on allegedly *serious* phenomena at the time.

Thomas

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