"CB" wrote:
> 2.Pov-3.1 did uncorrectly apply color-clipping and
> gamma-correction *before* antialiasing. I'm not sure
> whether this has been changed in 3.5

I don't know about gamma correction but color clipping is still done before
antialiasing.

However, doing color clipping after antialiasing have both advantages and
disadvantages.

Advantages:
An area with many small but very bright spots will be smoothened out to a
bright area.
(This can for example be used to do a blurred reflection using a reflective
texture with a normal that is scaled very small. Currently that doesn't work
well with bright objects because color clipping is done before
antialiasing.)

Disadvantages:
A very bright object will appear not to be antialiased even though
antialiasing is used because the bright area of every antialiased pixel will
dominate the result. I'm afraid this would be a pretty serious problem.

So it's a design question, not a bug.

Rune
--
3D images and anims, include files, tutorials and more:
Rune's World:    http://rsj.mobilixnet.dk (updated June 26)
POV-Ray Users:   http://rsj.mobilixnet.dk/povrayusers/
POV-Ray Webring: http://webring.povray.co.uk

Post a reply to this message