nospam wrote:

> [...]
> 
> Just my two cents here ...
> 
> In my .pov file, I set the assumed_gamma in my
> display settings to be the same as my display gamma.
> This allows me to "feedback" output images back into
> a render so that they don't get lighten or shortened
> by successive re-renderings.
> 
> I avoid PNG like the plague.  The idea (and theory)
> of PNG is wonderful, but no two programs seem to
> implement gamma correction the same way.  They never
> seem to agree on gamma.  The means that the
> appearance of the images gets messed up worse
> between programs than if I had not used PNG.  The
> TGA format has always worked well for me.  BMP has
> also worked well but is windows-specific and does
> not seem to allow an alpha channel.
> 
> Your mileage may vary
> 
> Hope it helps, even if only partially

Thanks. I use png mainly just because it's the default
for Povray on Linux, also it's lossless (though I guess
TGA is too).

Apart from height fields I'm not often recycling images
through subsequent renders, and I'm not doing any
post-processing in most cases.

-- 
Bill Hails

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