POV-Ray : Newsgroups : povray.newusers : starfield anti-aliasing problem : Re: starfield anti-aliasing problem Server Time
6 Sep 2024 00:21:18 EDT (-0400)
  Re: starfield anti-aliasing problem  
From: Peter Popov
Date: 23 May 1999 09:24:01
Message: <3748f28a.5605044@news.povray.org>
On Sun, 23 May 1999 08:21:04 GMT, non### [at] yobidness (Duke Nukem) wrote:

>Here's my problem. I'm working on a space scene. It's all done, and I
>want to use AA to make the ship look good. But, when I do that, the
>starfield in the background virtually disappears. I can barely see the
>stars, they're real dim because of the blending of AA. I tried
>pre-rendering the background and using an image map, but it has no
>effect. I'm using the stars.inc file included with POV (starfield1 to
>be precise). Does anyone have any ideas how I can use AA, but still
>make my stars look as good as they do without it? Or, am I stuck with
>just not using AA? Thanks in advance.
>
>Scott Holland

AA screws starfields up because it takes several samples per pixels
and averages them to get the final pixel color, whereas only one or
two of these sample rays will hit a "star" (either texture or object).
So at +r3 stars usuallly get 1/9 or 2/9 or max 1/3 of their intended
brightness. The solution is to color the stars using a high value of
white like White*4.5, for example.

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


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