POV-Ray : Newsgroups : povray.programming : Bug in +UA output? : Re: Bug in +UA output? Server Time
28 Jun 2024 02:26:42 EDT (-0400)
  Re: Bug in +UA output?  
From: Peter Popov
Date: 28 Apr 1999 14:45:58
Message: <37274851.596127@news.povray.org>
On Sat, 24 Apr 1999 03:35:10 GMT, shi### [at] gatenet (Jeff Lee) wrote:

>I've been trying to use the +UA (output Alpha-channel data) option to
>create sprites with transparency information.  Normally, it works like a
>charm.
>
>But if I want to render, say, a glass sphere with something opaque
>inside it, the opaque bit still turns out transparent.  It looks as
>though POV-Ray just takes the transparency data of the first surface it
>strikes, and though it continues to calculate the RGB values by
>splitting the rays, etc., it doesn't seem to update the transparency
>component any further.
>
>Is there a way around this?

That's the behaviour that lead me to believe that more powerful alpha
channel control will be of use. Ever tried the infamous
chrome-sphere-on-a-checkered-floor scene with +ua? If you only need
the sphere, you'll need to make another scene with it only. See the
other reply for a solution.

---------
Peter Popov
ICQ: 15002700


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