In article <3c78cad6$1@news.povray.org>,
 "Rune" <run### [at] mobilixnetdk> wrote:

> You can't talk about realistic. AA doesn't happen in nature... ;)

But it is intended to calculate a specific thing (the color over the 
entire pixel), and clipping makes that less accurate. And it apparently 
also happens with focal blur...not good!
I'd gladly take having unantialiased edges on superbright objects to 
have them work properly in other cases...I can work around the first 
problem by adding information to the scene, I can't work around the 
second (currently existing) problem. :-(
It also seems unintuitive to me: you have a bunch of small stars, and 
antialiasing wipes them out because they don't cover whole pixels. You 
make them brighter to compensate...nothing happens?!?
And with focal blur, the problem is worse...you simply will get a less 
realistic image.
Maybe some flag to limit the max value of a sample...radiosity uses 
similar tricks.


> The current AA give the same result as if you rendered the image at a 
> very large resolution and then scaled it down.

Not really...you could render to a format with a larger dynamic range, 
like RGBE, and process with tools that can handle it. ;-)

-- 
Christopher James Huff <chr### [at] maccom>
POV-Ray TAG e-mail: chr### [at] tagpovrayorg
TAG web site: http://tag.povray.org/

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