"JYR" <jyr### [at] hotmailcom> wrote in message 
news:web.42ada38cdb562bc76a3607400@news.povray.org...
>
> OTOH, there is a known difference in the way gamma correction is done
> between 3.6.1a and 3.7.beta5a. This file renders exactly the same if
> assumed_gamma is set at 2.2 instead of 1...

Okay, I see now that using assumed_gamma 2.2 in version 3.6 did make 
micro.pov look the same for both versions.

However, something is still wrong. I was trying my own scene file in 3.7 
beta when I needed to go back to v3.6, for animation because the beta 5a 
still isn't able to animate.

Making the assumed_gamma change, as you suggested, did not correct the media 
appearance. I'm seeing an oversaturation of the media. Since I was making 
this media-filled object in 3.7 it only looks correct there. Only conclusion 
I can make is that something isn't handling the media in the same way 
between the two versions.

The clue might be that the density is greater than 1, and now, after 
checking with it set to only rgb <1,1,1> I see it seems to fix the look of 
it.

Could density be getting clipped in some way in 3.7 beta 5a?

Bob Hughes

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